CHE 242 Tutorial 3: Problems & Answers Week 4: Feb 2- 6‚ 2009 1. Consider a gas that occupies 1.00 dm3 at a pressure of 2.00 bar. If the gas is compressed isothermally at constant external pressure‚ Pext‚ so that the final volume is 0.500 dm3‚ what is the smallest value Pext can have? Calculate the work involved using this value of Pext. Solution For compression to occur‚ the value of Pext must be at least as large as the final pressure of the gas. P1 = 2.00 bar‚ V1 = 1.00 dm3‚ V2 = 0.500
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many things people are guilty of‚ one of those guilt’s is stereotyping others ‚ even if it wasn’t meant in a harmful are negative way we all have been a victim or the aggressor . This paper will discuses what stereotypes are‚ how they affect people and how stereotypes can affect society. However‚ the common factor in either situation is that no good comes from stereotyping others. All most everyone in there lifetime has stereotyped others are have been a victim of stereotypes. A stereotype is
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WHY IS IT IMPORTANT TO PROTECT OUR FORESTS & THE ANIMALS THAT LIVE THERE? WHY IS IT IMPORTANT TO PROTECT OUR FORESTS & THE ANIMALS THAT LIVE THERE Forests are essential for life on Earth. They give us shade and shelter‚ refuge and refreshment‚ clean air and water. Today‚ with a growing global population and subsequent demand for forest products‚ the forests of the world are at risk from widespread deforestation and degradation. Ancient forests are in crisis throughout the world. Home to millions
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ALCHEMY TO CHEMISTRY Can we say that alchemy and chemistry are two different things? Actually no‚ we can’t. Alchemy is the pioneer of today’s modern chemistry. As the time passed alchemy has changed and developed to form Chemistry. Therefore we shouldn’t think that they are two different subjects. In this article‚ first of all you will learn how alchemy was found and evolved .After that how it transitioned from alchemy to chemistry and finally the similarities and differences between them.
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How did 9/11/01 affect the way we live in America today? There have been many turning points in American History; however none have the same effect as September 11‚ 2001‚ and many Americans relate the day to the country’s loss of innocence. As a result of 9/11 many American’s lives were affected emotionally‚ physically‚ economically‚ and politically. A month after the terrorist attack in the US‚ a war was launched by the United States. This war was known as the “fight back” war. It was the
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10.01x+11.01-11.01x=10.81 -1.00x=0.2 X=0.2 The Mole and Avogadro’s constant Mole: the SI unit that is used to measure how much of a substance. (balanced eqn coefficient are moles) Converting Moles -> number of particles Number of Moles = number of particles / Avogadro’s constant Avogadro’s constant: 6.02214179 x 10^23 Converting Moles to Mass/molar mass Molar Mass: how much grams per mol of an element = atomic mass Number of Moles = mass / Molar Mass Percentage Composition Laws of definite
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1. Iron (IIII) and copper (II) sulfate solution Fill a small test tube halfway with copper (II) sulfate solution. Add a 2.0 gram iron rod to the solution and observe the reaction. 2 Fe + 3 CuSO4 = 3 Cu + Fe2(SO4)3 The new product is iron (III) sulfate‚ it contains the Fe 3+ ion which is brown. Lead (II) nitrate and potassium iodide solutions Pour about 2.0 mL of lead (II) nitrate into the test tube. Add 5 to 10 drops of potassium iodide solution to the test tube and record your observations
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How to Protect Human Lives and Environment As time passes by‚ we can see lots of people are start fighting for the rights of wild animals and plants to survive on this earth that controlled by the human activities. Today we became more self-aware that we are also a part of the nature‚ and therefore‚ anything that harms the environment will also give a great impact towards us‚ and that the very existence of human life depends on preserving a balanced global ecosystem. I personally think that
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How Food Affects Society There are many factors that play a major role in the health of a human being. One of the most important factors involved is food. Without food in the human life‚ the human life would cease to exist. The consumption of food is what energizes the human body‚ gives it the nutrition it needs‚ and most importantly‚ keeps the body actively working and living. Unfortunately over the years‚ numerous changes have taken an effect on food. Those effects have also had an
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Music has the unique ability to affect the listeners’ mood. When an athlete is pumping himself up for a game‚ a mathematician is trying to solve an equation‚ what does he do? He listens to music. When a man is romancing a woman‚ or a heartbroken girl is trying to calm herself after a breakup‚ music is used to set the tone. A director can convey a defined emotion in a scene with the right score. The music in a mass helps people stay reverent and focused. In all these cases‚ music plays a critical
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