Summary:
- Avogadro’s law states that the volume of a gas is directly proportional to the number of moles of gas when the temperature and pressure are held constant.
- If the container holding the gas is rigid rather than flexible, pressure can be substituted for volume in the equation.
- Adding gas to a rigid container makes the pressure increase.
- Since a relatively small amount of additional helium was added to the balloon, its volume increases slightly.
- The volume of the balloon increases as you add mole of gas to it by blowing it up.