The amount of energy Essay Example for Free

The amount of energy Essay In this investigation I will be burning alcohols to heat up a can of water. I will be burning four alcohols, methanol, ethanol, propanol and butanol. The aim is to find out how much energy is produced when burning these alcohols. Alcohols react with oxygen in the air to form water and carbon dioxide. The reaction that is involved in burning alcohols is exothermic because heat is given out. From this reason the reactant energy is higher than that of the product. The energy is given out when forming the bonds between the new water and carbon dioxide molecules. The amount of energy produced by such exothermic reactions can be calculated by using the formula Mass of the substance x rise in temp x SHC (specific heat capacity). The specific heat capacity is the number of joules required to heat one gram of water by 1 °C. I chose to use water because it is safe, easily found, and has a reliable specific heat capacity of 4.2. I will also need to ensure that I conduct the experiments safely. As alcohols are very dangerous and highly flammable I will wear my safety goggles at all times. I will need to keep all lose items off clothing tucked in. the lids on the alcohols must be kept on at all times to prevent evaporation or any spillages. Prediction I predict that the more bonds there are holding the carbon, oxygen and hydrogen atoms together, more energy will be required to break them apart. For example Ethanol has the formula C H OH. In this formula you have five C-H bonds, one C-C bond, one C-O bond and one O-H bond. To separate these types of bonds you require a certain amount of energy which I will show in a table. To separate C-H bond you need to apply 410 joules of energy. There are five such bonds in ethanol so you multiply 410 by five to get 2050 joules. You do these calculations for all the other types of bonds that make up ethanol, add them all together and you get 3270 joules. All of the other alcohols can be broken up in this way. Below is a table showing the energy required to break up the bonds in each alcohol. Type of alcohol Energy required to break the bonds in the alcohol (kj) As you can see a longer molecule takes more energy to break its bonds, in this case Butanol. Compared to a smaller molecule, methanol that requires less energy to do so. I can come to predict that the longer the molecular structure in the alcohol the more energy it will take to remove the bonds. So when I come to predicting results I can safely say that Butanol will evolve more energy than methanol simply because it has more bonds to break. Analysing and drawing conclusions I think my results tables and graphs clearly show the pattern that I have found in this experiment. That is that heat combustion does increase when  the amount of carbon atoms increases. I believe that my results do show a positive correlation and do show that the more carbon atoms there are the heat of combustion goes up. Another reason for these results is that the molecular length becomes longer in the bigger molecules increasing the surface area hence allowing more energy to be released. These results do support my initial prediction. After this I can conclude that my initial prediction was actually right but I didnt allow for all of the experimental errors. I conclude that carbon atoms in alcohols do have an effect on the heat of combustion. As the amount of carbon atoms go up the heat of combustion does. This is because everytime you add another carbon atom you are also adding 15 onto the relative atomic mass that plays a big part in calculating the end results. Evaluation Sound and light energy could have been lost into the room. I could have placed heatproof mats around my experimental area, they could not have kept all of the heat in and much of this would have been taken away in the convection currents through the air. The tin that the water was being held in would have used up some of the heat energy to heat itself up. The alcohol containers had varying amounts of alcohol in them to start with along with varying sizes of wicks. This all contributed to the fact that the flame coming from the alcohol was varying in size so was sometimes not even touching the tin can. The room temperature would also have acted as a cooling agent. One of the less important factors could have been if there was a lacking of oxygen leading to incomplete combustion. Then the oxygen molecules would only form with one carbon molecule producing carbon monoxide but I doubt this actually happened. This was a very difficult experiment to conduct in a classroom because there are lots of potential ways of losing heat because everything likes to gain heat energy. I think the thing that hindered our results the most was the fact that gusts of air and convection currents were taking the heat away from the experimental area and there was no way to stop this. Perhaps if I started the experiment below room temperature, so that the amount of gained  energy, from room temperature, might equal the energy lost at temperatures higher than room temperature, then the experiment could produce better results. If there is a limited supply of oxygen then you get carbon monoxide (each carbon atom can only bond with one oxygen atom). This is when incomplete combustion has occurred. This is so because the carbon monoxide could react some more to make carbon dioxide. If the oxygen supply is very limited then you get some atoms of carbon released before they can bond with any oxygen atoms. This is what we call soot. Since heat is given out when bonds form, less energy is given out by incomplete combustion. So this is why it affects the outcome of the experiment. To overcome this problem, I would have to make sure a sufficient supply of oxygen was involved in the reaction.

The Coliseum :: essays papers

Architecture of the ancient Roman Empire is considered one of the most impressive of all time. The city of Rome once was home to more than one million residents in the early centuries. The Romans had a fine selection of building monuments in the city of Rome including the forums for civic services, temples of worship, and amphitheaters for recreation and play. The Romans made great use and pioneered great architecture mechanisms including arches, columns, and even mechanical elements in pulleys and early elevators. However, when one tends to think of great buildings, one building stands out in Rome. This building is the Flavian Amphitheatre, or better Known as the Coliseum. The Coliseum is the greatest standing building of Rome, and one of the most recognized worldwide architectural achievements to this day. The amphitheater is a type of architecture that was without Greek precedents. This makes sense since its primary purpose was to hold gladitiator fights and brutal shows which were banned in Athens at the time. Such events held in Roman amphitheaters were horseracing, gymnastics, mock cavalry battles, footraces, prizefighting, wrestling, fights between animals, between men, animals and men, and even naumachiae, or mock sea battles. The great building although fitting and plain in design to its surroundings of Rome still stood out due to its sheer monstrosity and oval shape. Although the site viewed today is still a marvel, back in the days of its prime it was a spectacular site that would be difficult to apprehend with only words. The emperor given credit for the idea of the coliseum was Vespasian. Building commenced around 72 AD. But Vespian would not live to see his greatest accomplishment finished. Titus, Vespasian's son, completed his fathers dream around 80 AD. The dedication of the Coliseum was a lavish gladiator show that lasted for exactly one hundred days in which over nine thousand animals were killed. A typical day at the Coliseum show usually started with a bloodless comic relief battle, often times with dwarfs, women, or cripples battling with wooden objects. The gladiator fights were the most popular and prominent fights. These featured two highly trained men battling for courage, strength, and dignity. They would often rather take a blow and stand strong than whimper and run in defense. It is written that famous women would even leave their husbands for famous gladiators, which were known to be very scarred and ugly by Roman standards.

Macbeth’s changing state of mind Essay

With close reference to three key scenes within the play, explore the dramatic devices that Shakespeare employs to reflect Macbeth’s changing state of mind. Macbeth is another one of Shakespeare’s great tragedies, based on Holinshed’s Chronicles of England, Scotland, and Ireland. It tells us about the fall of the ambitious couple, Macbeth and Lady Macbeth. Macbeth is the tragic hero, a character who has a fatal (tragic) flaw within himself that he cannot change. He is not a bad person to begin with but he does become evil; he is just too ambitious. Macbeth is a story about the murder of a king by Macbeth, and the revenge of a son (Malcolm), three witches who plot against Macbeth, and Macbeth’s rise and fall. At the time Macbeth was written King James the 6th of Scotland also became King James the 1st of England. He moved from Scotland to London, there became a fashion for all things Scottish. King James’s family tree goes back to Banquo therefore Shakespeare made Banquo innocent to not offend the king. King James was extremely interested in witchcraft; he even wrote a book called Daemonology. To the audience in the 16th century witchcraft was a really big issue and more importantly it was so real for them that it forced English parliament to create laws against it. We don’t realise it but people were absolutely terrified of witches and they believed in them just as much as they believed in God. The main power the witches were supposed to have, was telling the future, another was being able to open locks and sail through the roughest seas in a sieve. We see that witches have a big impact and play a big part in the play Macbeth. This is shown as the first people to enter are the three witches and these witches have a big influence on Macbeths changing state of mind as they drive him on to kill Duncan along with Lady Macbeth and Macbeths own ambition. From the outset we see that Macbeth is a very ambitious and loyal soldier as Duncan announces that he has done well in battle fighting the Norwegians. Duncan gives Macbeth the title â€Å"Thane of Cawdor† as reward for his valour; Shakespeare uses irony here as the first thane of Cawdor betrayed Duncan and Duncan later dies at the sword of trusted Macbeth. In Act 1 scene 7 we see Macbeth reveal a whole series of conflicting thoughts and feelings by talking aloud to the audience, this is called a soliloquy; this section is mainly about his true feelings about committing the murder of King Duncan. Here his state of mind has changed from at the start of the play when he was given the title, but know the witches have told him he will become the King his state of mind is insecure about the next step forward by committing the crime. Macbeth recognises that his intentions are crime when he says the word â€Å"assassination† Macbeth declares that King Duncan has been a very good king â€Å"this Duncan Hath borne his faculties so meek hath been so clear in his great office† and that his murder would therefore not be justified in the eyes of heaven. Macbeth realises King Duncan has done an awful lot for him and realises he should be very grateful. â€Å"He’s here in double trust; First as I am his kinsman and his subject† this is one of his main reasons why he doesn’t want to kill Duncan as he says he is a subject to the King so he should be a loyal servant to him. â€Å"Strong both against the deed; then, as his host, who should against his murderer shut the door† Secondly as host he should protect King Duncan from intruders whilst he is in his care. During the soliloquy Shakespeare uses a lot of alliterations to emphasise Macbeths point â€Å"Trumpet- tongued† and â€Å"naked newborn† The first two lines is where Shakespeare uses a euphemism â€Å"it† to refer to the murder, this shows us that he realises what e is doing is wrong, he also uses repetition to add to the flow and pace of the text, this emphasis how quickly Macbeth is thinking and also shows his confusion and his fear of the murder and this is a good dramatic technique. During lines two to five of the soliloquy we see Shakespeare change the structure as he writes it to appear like a thought process as it is broke and there are lots of uses of commas, this structure shows us that his thought process is confused and erratic with lots of pauses. The sentence â€Å"this blow† relates to the murder as Macbeth won’t say it and this shows the audience he is frightened of committing it. In lines six to seven Shakespeare uses yet another of the many dramatic techniques, here we see him use imagery as Macbeth says â€Å"But here, upon this bank and shoal of time, we’d jump the life to come† here Macbeth is saying that eternity is the sea and his time living is in a sandbank In the sea. He’s worried what will happen after he dies. Will he be punished in the after life? He needs to jump to the next life so he can’t be punished. Throughout the soliloquy the audience are realising that Macbeths conscience is and will get on top of him after the Murder. This links back to Act 1 scene 5 where Lady Macbeth realises she will have to take a leading role and will have to urge him on to kill Duncan as she knows Macbeth will not carry out the deed alone. Directly after Macbeth’s soliloquy Lady Macbeth and Macbeth ask each other a short series of questions about Duncan, â€Å"He has almost supped: why have you left the chamber? Hath he asked for me? Know you not he has? The unanswered questions they both pose highlight the tension of the situation; this shows us how edgy Macbeth feels. Lady Macbeth then has a long speech where Shakespeare uses rhetorical questions to tell Macbeth that she is angry with his change of Mind. Here Macbeth’s state of mind has changed from the beginning the play where he was going to kill Duncan but after his soliloquy where he thought more about it and what Duncan has done for him, his mind has completely changed to the opposite. The audience see that his conscience has got the better of him and how easily swayed he is. By the end of Act 1 scene 7 Macbeths mind has changed again due to his wife, this shows the audience just how emotionally insecure he is. His mind has changed because of Lady Macbeth’s comments as she continues to speak to him in a confident and calculating way. Lady Macbeth says â€Å"how tender ’tis to love the babe that milks me: I would, while it was smiling in my face , have plucked my nipple from his boneless gums, And dashed the brains out, had I so sworn as you Have done this.† This is basically saying that she would have taken her newborn child off her breast and smashed it on its head if Macbeth asks her to do so. This is a very effective use of powerful imagery and is the kind of language that would bring Macbeth to Lady Macbeth’s side. Lady Macbeth has the murder all planned out which shows the audience just how desperate she is to become queen. As we leave Act 1 scene 7 Macbeth is as ready as Lady Macbeth is to kill King Duncan. In Act 2 scene 1 â€Å"is this a dagger I see before me† this hallucination leads him on to kill Duncan. His conscience is getting the better of him. This hallucination is a great dramatic technique as it would be very powerful for the audience to see. Here we see Macbeth is losing his mind a little, and he is still very insecure mentally. At the start of Act 2 scene 2 Shakespeare uses another soliloquy to show Lady Macbeths feelings to the audience, her soliloquy shows her exhilaration and determination as the owl screeching doesn’t frighten her, it is rather taken as a good sign that Duncan will be dead soon. When Macbeth enters Lady Macbeth is overjoyed â€Å"Husband!† as she started to doubt her husband’s capacity to do the deed. In the first few lines there are a lot of questions that Macbeth asks â€Å"I have done the deed. Didst thou not hear a noise?† and â€Å"When?† and â€Å"as I descended?† all these questions make Macbeth seem jumpy. It shows the audience his mind is insecure as they both speak to each other in short jerky sentences which show discomfort. As Act 2 scene 2 carries on we see that Lady Macbeth is still the dominant partner but we know it doesn’t stay this way throughout the play as things change later and the pair’s roles are virtually reversed. Macbeth knows what he has done is evil and is worried by the fact that he couldn’t say Amen â€Å"Listening their fear, I could not say `Amen.'† Macbeth then goes on to say â€Å"sleep no more!† this tells the audience that he is worried everything will change now and that he wont be able to sleep properly again. His behaviour has completely changed from the start of the play where he is considered a â€Å"brave warrior† he is now weak and down and out and this is put across very well by Shakespeare. His state of mind has now changed again after carrying the murder out. Before the murder he was as ready as Lady Macbeth but know his conscience has got on top of him again and we see that he is feeling discomfort. Shakespeare uses more imagery as he says â€Å"great natures second course† this is referring to natures other form (either spending time walking or sleeping) and is the meat of the meal (meaning the second course of a meal) another time in the play where Macbeth reflects on what he has lost or might have lost is in Act 5 scene 3 where he is nervous and slightly concerned but he thinks he is untouchable and is over confident. He is approaching his death here and realises that he is going to die, he can’t do anything, and he says â€Å"hang everyone that talks of fear.† He puts on his armour early, as this is where Macbeth feels safest, where he started his career, we see here that his state of mind has changed again, it has got stronger as his wife’s mind has got weaker, there roles have completely reversed from the beginning of the play. In the same sentence he asks about Lady Macbeth. The doctor says she has got to cure herself, the doctor implies that she needs to go to confession. Here we see him losing his wife and his life and this relates back to Act 2 scene 2. At this point in the play Shakespeare is revealing that Macbeth and Lady Macbeths relationship is very unstable as Lady Macbeth is trying to relieve Macbeth of his guilt. As Macbeth has committed a worse murder as he has killed a king which is called deicide. Act 4 scene 1 opens â€Å"a desolate place near Forres In the middle, a boiling cauldron. Thunder. Enter the three witches† this is a very powerful opening by Shakespeare as it describes the setting of the scene, the â€Å"boiling cauldron† symbolises the burning fires of hell and also that there is trouble brewing,this shows the tension of Macbeths skin. It shows his strange and repulsive thoughts like in the cauldron, and this may be a symbol for Macbeth that this will be where he goes. Also Shakespeare has split the word â€Å"thunder† from â€Å"lightning† this relates to Macbeths and Lady Macbeths relationship being detached and separated. The whole sentence creates an eerie atmosphere. This atmosphere symbolises Macbeths mind at this point as it is mysterious and frightening. The witches refer to Macbeth as â€Å"Something wicked† In conclusion we see that Macbeths mind has changed dramatically throughout the play, at first we see him feeling insecure and after the murder we see him still edgy and jumpy. But when we get further through the play we see his state of mind changes as he feels untouchable but he still feels on edge as in Act 5 scene3 we see him try to comfort himself by repeating the witches’ prophecies as he is told of the approaching armies. At the end of the play we see Macbeth as an evil character, but this isn’t the same at the start, where we see him as more of a hero.

Character Analysis Of Hot Fuzz - 933 Words

Jokes are jokes for a reason. They aren’t meant to be taken seriously. Comedic films have provided entertainment to the people of the world for years. They are the go-to method form of comic relief and is valued greatly in the world. A great example of this would be the movie, Hot Fuzz. Directed by Edgar Wright and released on March 14, 2007, Hot Fuzz is about a London police officer, Nicholas Angel, who is very good at his job and is â€Å"too good† for London, and is reassigned to a quiet town called, â€Å"Sandford†. In this town, the police force is completely useless. None of the officers have any of the traditional values that normal police officers have. So when a series of â€Å"accidents† happen in the town, Angel believes there is something†¦show more content†¦The police are completely useless when Angel arrives in Sandford. All they do is sit around the station and eat cake. It’s funny how different the society is in this plot f rom the real world. In the real world, police would never be like this. Most towns pride themselves on how strong their police force is so that they can keep their town safe, so it’s funny to see a town operate the complete opposite way. The actors in Hot Fuzz helped make the characters more successful in the movie. Hot Fuzz is part of a film series trilogy called, the â€Å"Three Flavours Cornetto Trilogy†. The two other movies in the trilogy being Shaun of the Dead and The World’s End. What makes the film series trilogy unique is that they have are directed by Edgar Wright and Simon Pegg and Nick Frost (the two main characters) star in all three of these movies. That adds familiarity to the movies because you already know about the actors. It is also a funny movie because you can relate to the movie through the characters. According the Newsweek, Hot Fuzz is â€Å"bigger, faster cut-and funnier-movie than its predecessor†. The characters also make this funny becuase of the things that they do in the movie. For example, in the big scene where Angel and Butterman go back to the town in Sansford to fight the people in the Neighborhood Watch Association, it’s a funny visual to seeShow MoreRe latedAutobilography of Zlatan Ibrahimovic116934 Words   |  468 PagesSwedish stars. I wanted to become the best while being cocky. Not that I thought I d become a superstar or anything like that. Jesus, I came from Rosengà ¥rd! But maybe those things made me a bit different. I was trouble. I was crazy. But I had character. I wasn t always in time to school. I had problems getting up in the mornings, I still do, but I did my homework, at least sometimes. Math was the easiest. Bam, bam, bam and I saw the solution. It was a bit like on the football field. Images andRead MoreLogical Reasoning189930 Words   |  760 Pageslooking at alternative actions that can be taken, then considering the probable good consequences of each action and the probable bad consequences while weighing the positive and negative impact of each consequence. It’s a kind of cost-benefit analysis. Exercises 1. Columbus Day is an American holiday. Write a short essay that weighs the pros and cons and then comes to a decision about whether there should be more or less public celebration (by Americans and their institutions) on Columbus