Final answer:
When a gas is heated in a sealed rigid container, the pressure will increase due to the rise in kinetic energy and resultant more forceful collisions of gas molecules with the container walls.
Step-by-step explanation:
When a sample of gas is heated in a sealed rigid container from 200 K, the pressure will Increase. According to the kinetic theory of gases, heating the gas will increase the kinetic energy of gas molecules, leading to more forceful collisions with the walls of the container. Because the container is rigid, the volume does not change. An increase in temperature of a gas in a rigid container always leads to an increase in pressure. This is in line with the basic principles of gas laws, particularly Charles's Law, which states that at constant volume, the pressure of a gas is directly proportional to its temperature (measured in Kelvin).