Question

Which of the following is the most reasonable explanation for a drop in temperature of gas?

A) a decrease in the volume of the container
B) a decrease in the average kinetic energy of the gas particles
C)an increase in the average potential energy of the gas particles
D) an increase in gas pressure

Answer 1

B) a decrease in the average kinetic energy of the gas particles

Answer 2

Answer: The correct answer is option B.

Step-by-step explanation:

Average kinetic energy of the gas molecule is given by relation:

`E_K=(3)/(2)(R)/(N_A)* T`

`N_A` = Avogadro Number

T = Temperature of the gas in Kelvins.

R = Universal gas constant

`E_K\propto T`

With increase in temperature the kinetic energy of the gas molecule increases and vice-versa.

So, according to the question the explanation for a drop in temperature of the gas is decrease in average kinetic energy of the gas molecules.

Hence, the correct answer is option B.