SCIENCE REPORT AMMONIUM NITRATE NH4NO3 Problem Our task was to investigate what the optimum ratio of solute to solvent that will produce the maximum cooling/heating effect? Hypothesis With a smaller quantity of water (50mls) and the same amount of Ammonium Nitrate added. After any period of time the mixture will be a cooler temperature than that of a mixture with a larger quantity of water. Variables „X Water „X Teaspoons „X Time „X Ammonium Nitrate „X Thermometer „X Stirring (used thermometer) „« Changed/Uncontrolled Variables - The amount of times the mixture was stirred. We stirred the mixture until the Ammonium Nitrate was dissolved, so the amount of times we stirred after each teaspoon was different. - Each teaspoon may not have been equal. Measurements were made based on judgment and not exact measurements. „« Controlled Variables - Amount of water used in each test was equal (100mls and 50mls). - Total amount of Ammonium Nitrate used (150grams). - Temperature was measured after and exact time i.e. 1 minute, 2 minutes, 3 minutes. Equipment Trial test „X 1 thermometer „X 1 plastic teaspoon „X Safety glasses „X 100ml beaker „X 30mls of water „X 1 teaspoon of Ammonium Nitrate „X 1 graduated cylinder „X 1 stirring rod First Test „X 1 thermometer „X 1 plastic teaspoon „X 1 stop watch „X 1 stirring rod „X Safety glasses X3 (one for each group member) „X 250ml beaker „X 1 graduated cylinder „X 150 grams of Ammonium Nitrate „X 100mls of water Second Test „X 1 thermometer „X 1 plastic teaspoon „X 1 stop watch „X 1 stirring rod „X Safety glasses X3 (one for each group member) „X 100ml beaker „X 1 graduated cylinder „X leftover from original 150 grams of Ammonium Nitrate „X 50mls of water NOTE: The stirring rod was not used in the First and Second experiments, as it was not available. A substitute we used the thermometer. Methods Trial Test In a 100ml beaker 30mls of water was placed the temperature of the water was recorded. 1 teaspoon of Ammonium Nitrate was added to the water and stirred until dissolved. The temperature was then recorded again. This was to see the difference between the initial temperature and the final temperature. First Test In a 250ml beaker place 100mls of water, measure the temperature of the water and record this initial temperature onto a table. Set the timer and add one teaspoon of Ammonium Nitrate to the water, stir this continuously until the Ammonium Nitrate has dissolved. After 1 minute measure the temperature and record it, do this for a further 2 minutes (3 minutes in total). Repeat this process for a total of 10 teaspoons. Second Test In a 100ml beaker place 50mls of water, measure the temperature of the water and record this initial temperature onto a table. Set the timer and add one teaspoon of Ammonium Nitrate to the water, stir this continuously until the Ammonium Nitrate has dissolved.
First, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder. This water was then poured into the styrofoam cup that will be used to gather the hot water later. The water level was then marked using a pen on the inside of the cup. The water was then dumped out, and the cup was dried. Next, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder, and the fish tank thermometer was placed in the water. Once the temperature was stabilizing in the graduated cylinder, the marked styrofoam cup was filled to the mark with hot water. Quickly, the temperature of the regular water was recorded immediately before it was poured into the styrofoam cup. The regular/hot water was mixed for a couple seconds, and the fish tank thermometer was then submerged into the water. After approximately 30 seconds, the temperature of the mixture leveled out, and was recorded. This was repeated three
8. Continue stirring. Record the temperature at which crystals begin to appear in the solution.
The emphasis on ancient leaders between these two pieces of forms the core comparison among them. The Great Pyramids at Giza spins around Egyptian Pharaoh known as Khufu. He was the one who constructed the pyramids that later converted to being his tomb. The Autobiography of Amenemhab essentially focused on captured prisoners, soldiers and ancient kings. The primary goal under this reign is to capture many prisoners and present them to the king. These two pieces describes our theme on the creation of legacy by the creation of the massive pyramids that is now classified under the Seven World Wonders and the soldier who fought so hard to capture as many prisoners as he
The ancient world was truly a wonderful and interesting thing. Mankind developed and evolved greatly during this time. Also during this time, many advancements in technology helped lead to great master architecture. The Great Pyramid, Temple of Artemis and the Statue of Zeus at Olympia are some of these famous works. These masters of architecture can often be referred to the seven wonders of the ancient world. Sadly, all but one of these ancient wonders have been lost to the times, the only wonder that still remains is the Great Pyramid of Giza. The topic of my essay is Ancient Egypt. During the course of this essay the basic details of who, what, when, where, how and why will be discussed.
7.) After you have heated them to the right temperatures, pour the excess water into a dry evaporating dish. ( Be sure not to get any of the substance in your solution. )
Never before in history did any monument receive such wide attention from the public and media like the Great Sphinx of Giza. The 73.5m long and 20m high (Dieter Arnold) stone carved statue not only fascinates people from all around the world, but also created countless movie ideas, novels, video games and raises questions to those who are interested. Undoubtedly, Sphinx has become one of the most notable figures of ancient Egyptian culture just beside the pyramids in the eyes of westerners. However, many questions remained in mysteries for almost decades until the excavation of 1925 by Emile Baraize revealed the Sphinx’s exotic design to the world's view. Why did the ancient Egyptians build this massive structure? For what purpose would they want to invest such resources and labors to initiate such complex project? How was it built and how did the Egyptians overcome the enormous difficulties with past technologies? The purpose of this paper would be discussing the possible identity of whom the Sphinx might be and compare and analyze the evidence from a material culture point of view. The paper would be lay out to four different sections. First part would briefly describe the purpose of this study as well as giving a brief modern history of the Sphinx. Second part would be discussing the style/meaning and its association and context with the pyramids of the Giza and how the Sphinx was built. The third part would be discussing kings who possibly commissioned the Sphinx to be built and analyze the style of the Pyramid to the style of those kings. Two kings that could be the owner of the Sphinx are Khafra and Khufu, which would be my main focus here and I would be discussing the pros and cons of the scholars’ different ideas. Last p...
In the beginning of this chapter it discusses how the pyramids were built, what purpose they served, the three pyramids at Giza, some messages found on the stones that were used to build pyramids, and what a mastabas is. Pyramids are tombs built for Egypt's pharaohs. Pyramids are large structures with four sides that are the shape of a triangle, that meet at the top to form a point. The ancient Egyptians used the pyramids as tombs for the pharaohs and temples for their gods. The pyramids have one or two little temples attached to them, which holds their relatives and servants.
"The Pyramids of Ancient Egypt." Intercity Oz Inc. 1999. Retrieved 15 November 2003 from http://www.touregypt.net/featurestories/pyramids.htm.
C. SUBPOINT: Lastly, with such amount of casing you can building up to 30 Empire State buildings.
...to their age and brittleness, it is difficult to gain permission to explore them, and while historians wait, more evidence is lost as it crumbles away. The majority of the mystery involving how the pyramids were built is derived from the lack of internal evidence that archeologists can access. As of today, the 3 most commonly used theories have been the external ramp theory, the modified external ramp theory and most recently, the internal ramp theory. Although the chances of the external and modified ramp theories being correct are slim, the evidence supporting their existence might have worn away by now, especially if the material that was used to build the ramps was weaker than that of the pyramids. This thought indirectly challenges the internal ramp theory as well because it also mentions the use of external ramps in building the bottom half of the monument.
2. In the large beaker, put water and boil it completely. After that, remove the beaker from heat. 3. Sample tubes (A-D) should be labeled and capped tightly.
Methodology: A plastic cup was filled half way with crushed ice and mixed with four spoonfuls of 5 mL of sodium chloride. A thermometer was quickly placed inside the cup to take the temperature and the
First, they are violating a contract or policy regulation. This means corrective action can be taken by the organization and by the giving state. Even more, this will not only call for employment termination but also federal charges. The employee must recognize that violating the terms set by the organization will mean a breach of contract. When any person is involved in a breach of contract, they must face the consequences. Above all, the employees must know that this policy is intended to protect them as much as it is intended to protect the organization. The policy must state that the abuse of the internet while at work will damage everybody’s professional
A lot of foreign students don’t have the English lever required by the university, as a result, they must take the ESL (English as a Second Language) classes. These classes are extremely helpful because you learn how to properly communicate which is something needed to get by everyday activities. On the contrary, this delays students because while other students are advancing with their majors, you are still learning English. “I have no idea what I will be doing in chemical engineering since I am still taking English classes. It is very frustrating, but I guess I need this particular skill in my major” says Joyce, a Rwandese student at Michigan State
In this experiment the Sodium Hydroxide solution went through three different phases where its quality and quantity changed. The first phase was called I. Preparing Approximately 0.1M NaOH, 1000mL of clear distilled water was boiled and then chilled to room temp.