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# CHEM 131 Lesson 5 Quiz

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Author: Dannie Young
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1. Given the conversion factors and definitions discussed in the lesson, which of the following is equivalent to 2 atm?
2. Which sentence below is NOT true about pressure?
3. You've got gas! A sample of it that, is. More specifically, a 350.0 mL sample in an flexible container that has a temperature of 293.15 K. Suppose you throw it on the stove and heat it to 373.15 K. What will the new volume be (in L)?
4. I have a cylinder sitting in my lab that contains 1.55 L of gas, and it's temperature is 305.15 K. If I compress the cylinder and change the volume to 0.755 L, what will be the new temperature in Celsius?
5. I have a pressure cooker in my underground lair that is brewing a diabolical solution. I set everything up and went upstairs, but forgot to write down the initial temperature. When I came downstairs later to check on it, I see that the pressure gauge shows that the pressure has decreased by 10 times, while the volume increased by 5 times. The temperature now reads -123.15 °C. What was the starting temperature when I left (in °C)?
6. A liquid generally wants to decrease the area of its surface as much as possible. The natural tendency to do this is known as what?
7. When you put water into an ice cube tray and stick it in the freezer to make ice, which of these is true?
8. Most people don't realize that once something starts to melt, cranking up the heat does't make the temperature of the substance higher, at least not until it is ALL melted. When you add lots of extra heat to a solid that is in the process of melting, what ends up happening to all of this extra energy you are adding? It is used to do what?
9. We discussed intermolecular forces in this lesson. What would be the result if we increased these forces within a liquid? It would
10. As we learned, matter exists in different states--solid, liquid and gas. Which one of these could be described as having low density and easily compressible?
11. Oxygen is a nonpolar gas, but it will dissolve a little bit in water (which is a polar solvent. Which intermolecular force(s) is/are responsible for the interaction between the two compounds? Explain in detail to receive credit.
12. What is the temperature of a 926 L compressed gas tank that contains 64.1 mol of carbon monoxide at a pressure of 38.1 atm? You must show all work to receive credit.

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