Final answer:
Option A: Pressures increase when the size of a container is decreased while holding a fixed amount of gas, due to more frequent collisions of gas molecules with the container walls.
Step-by-step explanation:
Pressures increase as the size of a container holding a set amount decreases. This is because when the volume of a container is decreased, the gas molecules inside have less space to move around. As a result, they collide with the walls of the container more frequently, which increases the pressure inside the container. The relationship between pressure, volume, and temperature of a gas is described by the ideal gas law. Furthermore, when heat adds energy to a system, the pressure is likely to increase if the volume remains constant or decreases. In summary, given a constant temperature and a fixed amount of gas, reducing the volume of the container will result in an increased pressure.
Pressure increases as the size of a container holding a set amount decreases. When the volume of a container is decreased, the gas molecules have less space to move around, resulting in more frequent collisions with the walls of the container. These increased collisions lead to a greater force applied to the container walls, causing an increased pressure on the walls.