Temperature and Kinetic Theory - MCQs

Begin and Good luck!

1. Which is the largest unit: one Celsius degree, one Kelvin degree, or one Fahrenheit degree?

• A) one Celsius degree
• B) one Kelvin degree
• C) one Fahrenheit degree
• D) both one Celsius degree and one Kelvin degree
• E) both one Fahrenheit degree and one Celsius degree

2. It turns out that – 40°C is the same temperature as – 40°F. Is there a temperature at which the Kelvin and Celsius scales agree?

• A) yes, at 0 °C
• B) yes, at -273 °C
• C) yes, at 0 K
• D) no

3. You may notice that if a mercury-in-glass thermometer is inserted into a hot liquid, the mercury column first drops, and then later starts to rise (as you expect). How do you explain this drop?

• A) the mercury contracts before the glass contracts
• B) the glass contracts before the mercury contracts
• C) the mercury contracts before the glass expands
• D) the glass expands before the mercury expands

4. Two drinking glasses are stuck, one inside the other. How would you get them unstuck?

• A) run hot water over them both
• B) put hot water in the inner one
• C) run hot water over the outer one
• D) run cold water over them both
• E) break the glasses

5. A steel tape measure is marked such that it gives accurate length measurements at room temperature. If the tape measure is used outside on a very hot day, how will its length measurements be affected?

• A) measured lengths will be too small
• B) measured lengths will still be accurate
• C) measured lengths will be too big

6. Metals such as brass expand when heated. The thin brass plate in the movie has a circular hole in its center. When the plate is heated, what will happen to the hole?

• A) gets larger
• B) gets smaller
• C) stays the same
• D) vanishes

7. A steel ring stands on edge with a rod of some material inside. As this system is heated, for which of the following rod materials will the rod eventually touch the top of the ring?

• A) aluminum
• B) steel
• C) glass
• D) aluminum and steel
• E) all three

8. You want to take apart a couple of aluminum parts held together by steel screws, but the screws are stuck. What should you do?

• A) heat the thing up
• B) cool the thing down
• C) blow the thing up

9. A grandfather clock uses a brass pendulum to keep perfect time at room temperature. If the air conditioning breaks down on a very hot summer day, how will the grandfather clock be affected?

• A) clock will run slower than usual
• B) clock will still keep perfect time
• C) clock will run faster than usual

10. Which has more molecules – a mole of nitrogen (N₂) gas or a mole of oxygen (O₂) gas?

• A) oxygen
• B) nitrogen
• C) both the same

11. Which weighs more – a mole of nitrogen (N₂) gas or a mole of oxygen (O₂) gas?

• A) oxygen
• B) nitrogen
• C) both the same

12. Two identical cylinders at the same temperature contain the same gas. If A contains three times as much gas as B, which cylinder has the higher pressure?

• A) cylinder A
• B) cylinder B
• C) both the same
• D) it depends on temp. T

13. Two identical cylinders at the same pressure contain the same gas. If A contains three times as much gas as B, which cylinder has the higher temperature?

• A) cylinder A
• B) cylinder B
• C) both the same
• D) it depends on temp. T

14. Two identical cylinders at the same temperature contain the same gas. If B has twice the volume and half the number of moles as A, how does the pressure in B compare with the pressure in A?

• A) P_B = 1/2 P_A
• B) P_B = 2 P_A
• C) P_B = 1/4 P_A
• D) P_B = 4 P_A
• E) P_B = P_A

15. A plastic soda bottle is empty and sits out in the sun, heating the air inside. Now you put the cap on tightly and put the bottle in the fridge. What happens to the bottle as it cools?

• A) it expands and may burst
• B) it does not change
• C) it contracts and the sides collapse inward
• D) it is too dark in the fridge to tell

16. What happens to the volume of a balloon if you put it in the freezer?

• A) it increases
• B) it does not change
• C) it decreases

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