Answer:
C. As the temperature increases, the speed of gas molecules increases.
Explanation:
one of the main 4 postulates of kinetic theory of gases is the relationship between the speed and temperature of gas molecules.
The speed of the molecules in a gas is proportional to the temperature and is inversely proportional to molar mass of the gas. In other words, as the temperature of a sample of gas is increased, the molecules speed up and the root mean square molecular speed increases as a result.
So, the right choice is:
C. As the temperature increases, the speed of gas molecules increases.