Two full 2 L bottles of water are placed on a table. Bottle 1 was just removed from a refrigerator; bottle 2 is at room temperature.Which of the following statements describes the average molecular kinetic energy and the speed of the molecules in each bottle?
A)Bottle 1 has the same average molecular kinetic energy as bottle 2, and the molecules have the same average speed in both bottles.
B)Bottle 1 has a smaller average molecular kinetic energy than bottle 2, and the molecules have the same average speed in both bottles.
C)Bottle 1 has a smaller average molecular kinetic energy than bottle 2, and the molecules have a slower average speed in bottle 1 than in bottle 2.
D)Bottle 1 has a larger average molecular kinetic energy than bottle 2, and the molecules have a slower average speed in bottle 1 than in bottle 2.

Question

Quizplus · Accepted Answer

The average molecular kinetic energy of a substance is directly related to its temperature. Since bottle 1 is colder than bottle 2, its molecules have less kinetic energy and move slower on average than the molecules in bottle 2.

Two Full 2 L Bottles of Water Are Placed on a Table