PHYS 231 Quiz #6

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 Cheat Sheet:
¯   ¯PV=nRT ¯  

		Q=mL 		   J/kg		   J/kg

		  

		   J/kg  C		   J/kg  C		   J/kg  C

		If an equation you need is not listed here, ask.

Multiple choice: 1 pt. each

1. Rod 1 and rod 2 are both made of aluminum, but rod 2 has twice the length of rod 1. The temperature of both rods is increased by a few degrees. What happens?

A. Rod 1 and rod 2 increase in length by the same amount.

B. Rod 1 shows a greater increase in length than rod 2.

* C. Rod 2 shows a greater increase in length than rod 1.

D. Not enough information is given.

2. Two strips of different metals are stuck together. When this bimetallic strip is heated,

* A. the strip bends toward the metal with lower .

B. the strip bends toward the metal with higher .

C. the strip does not bend.

D. the two strips separate.

3. Which of the following would be sure to increase the pressure in an ideal gas?

A. Increase the volume and increase the temperature.

B. Decrease the volume and decrease the temperature.

C. Increase the volume and decrease the temperature.

* D. Decrease the volume and increase the temperature.

4. Temperatures near large bodies of water tend to be more mild due to

* A. the large specific heat of water.

B. the small specific heat of water.

C. the large specific heat of the sea air.

D. the small specific heat of the sea air.

5. A glass of water has an ice cube floating in it. If, after adding some heat and allowing the system to once again reach equilibrium, we find that there is still ice in the glass, then

A. the final temperature is higher than the initial temperature.

B. the final temperature is lower than the initial temperature.

* C. the final temperature is the same as the initial temperature.

D. Not enough information is given.

6. An insulated container is separated into two parts by a membrane. A gas fills one part of the container. If the membrane is broken, what happens?

* A. The temperature of the gas remains the same.

B. The temperature of the gas decreases.

C. The temperature of the gas increases.

D. Not enough information is given.

7. Which of the following would definitely decrease the internal energy of a system?

A. Having the system do work and transmitting heat to the system.

B. Doing work on the system and extracting heat from the system.

C. Doing work on the system and transmitting heat to the system.

* D. Having the system do work and extracting heat from the system.

8. In which of the following types of processes is there no work done?

A. Adiabatic (no heat transfer)

* B. Isovolumetric (constant volume)

C. Isothermal (constant temperature)

D. Isobaric (constant pressure)

9. How much thermal energy is required to change a 40 g ice cube from ice at -10 C to steam at 110 C? (2 pts.)