Which of the following occurs when the temperature of a gas rises? 1. The kinetic activity of the gas increases. 2. The rate of molecular collisions increases. 3. The pressure exerted by the gas rises
a. 1, 2, and 3
b. 1 and 2 only
c. 2 and 3 only
d. 3 only
ANS: A
The velocity of gas molecules is directly proportional to temperature. As a gas is warmed, its ki-netic activity increases, its molecular collisions increase, and its pressure rises.
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