Explain how gas exerts pressure

Answer 1

Gas exerts pressure because gas molecules move randomly and rapidly in all directions, colliding with each other and with the walls of their container. As they collide with the walls, they exert a force on them, and the force per unit area is what we call pressure. So, the more gas molecules there are in a container and the faster they move, the greater the pressure they will exert. This is why gases can fill their containers completely and evenly, as each molecule pushes out in all directions, creating the same pressure throughout the container. Additionally, changes in temperature and volume can also affect the pressure of a gas.