Chapter 17- Phase Change (Homework) – Flashcards
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If you want to cook eggs by boiling them while in the mountains, then compared to sea level cooking you should:
A. Boil the egg for a shorter time.
B. Use a hotter flame.
C. Use more water.
D. Boil the eggs for a longer time.
answer
D. Boil the eggs for a longer time.
question
The increase in the temperature of 50 grams of water by 1 Celsius degree requires:
A. 50 Calories
B. 100 Calories
C. 150 Calories
D. 1 Calorie
answer
A. 50 Calories
question
The food in a refrigerator is cooled by:
A. None of these.
B. Condensation of the refrigerating fluid.
C. Vaporization of the refrigerating fluid.
answer
C. Vaporization of the refrigerating fluid.
question
Boiling water does not increase in temperature when additional heat is applied because:
A. The increased heating produces increased boiling and therefore increased cooling.
B. The temperature doesn't change in a change of state.
C. None of these.
D. Adding input energy doesn't increase the water's internal energy.
answer
A. The increased heating produces increased boiling and therefore increased cooling.
question
When a gas is changed to a liquid state, the gas:
A. Absorbs energy
B. Neither releases nor absorbs energy
C. Releases energy
answer
C. Releases energy
question
Evaporation is a cooling process and condensation is a:
A. Warming process
B. Neither a warming or cooling process.
C. Cooling process
answer
A. Warming process
