If a sample of nitrogen gas in a sealed container of fixed volume is heated from 25°C to 125°C,the value of which of the following quantities will remain constant?
A)the average speed of the molecules
B)the density of the nitrogen
C)the average intensity of a molecular collision with the walls of the container
D)the average kinetic energy of the molecules
E)the pressure of the gas

Question

Quizplus · Accepted Answer

According to the ideal gas law, at constant volume, the pressure of a gas is directly proportional to the temperature, which means that the pressure of the gas will increase when it is heated. Additionally, the average speed and kinetic energy of the molecules will both increase as the temperature increases. The intensity of molecular collisions with the walls of the container will also increase with temperature. However, the density of the nitrogen gas will remain constant because the volume of the container is fixed, and the number of molecules of gas in the container will remain the same. Therefore, the only quantity that will remain constant is the density of the nitrogen gas.

If a Sample of Nitrogen Gas in a Sealed Container