Chapter 10, Problem 1MCQ

To determine

The option which is related to the temperature.

Answer to Problem 1MCQ

Option (a).

Explanation of Solution

The measured value of the average kinetic energy of the molecules in a gas gives the temperature. Kinetic energy is formed due to the motion of the object. It is directly proportional to the speed of the molecules. When the temperature increases, the speed of the molecules increases which automatically change the kinetic energy of the molecule

The expression for the average kinetic energy of a gas molecule is,

    $K=\frac{3}{2}\frac{R}{N_A}T$

Here, $K$ is the average kinetic energy, $R$ is the gas constant, $N_A$ is the Avogadro number, $T$ is the temperature.

Conclusion:

Since the increase in temperature changes the speed of the molecules, option (a) is correct.

Since the temperature and potential energy are independent of each other , option (b) is incorrect.

The momentum is not associated with the temperature. Thus option (c) is incorrect.

Only kinetic energy has dependence with the temperature of the molecule, option (d) is incorrect.