Multiple Choice
Which of the following would cause the evaporation rate of a liquid to decrease?
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8. Thermochemistry
Nature of Energy
Multiple Choice
When molecules are heated, which of the following best describes what happens to them?
A
They stop vibrating and remain stationary.
B
Their kinetic energy increases, causing them to move faster.
C
They lose electrons and become ions.
D
Their mass increases significantly.
Verified step by step guidance1
Understand that heating molecules means adding thermal energy to the system.
Recall that temperature is a measure of the average kinetic energy of molecules in a substance.
When molecules are heated, their kinetic energy increases, which means they move faster and vibrate more vigorously.
Recognize that molecules do not stop vibrating or remain stationary when heated; instead, their motion intensifies.
Note that heating does not cause molecules to lose electrons or change their mass significantly; these are unrelated to the effect of temperature increase.
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