A gas with a fixed mass is enclosed in a container. Its temperature is raised while its volume remains unchanged. What effect does this have on the average kinetic energy of the molecules and on the pressure exerted on the walls of the container?
- Aaverage kinetic energy increases, pressure increases
- Baverage kinetic energy stays the same, pressure increases
- Caverage kinetic energy increases, pressure decreases
- Daverage kinetic energy decreases, pressure increases