3.3.3 Increasing the Pressure of a Gas

• Why does the temperature of air inside a bike pump increase when it is pumped?

  • Work is done on a gas when it is compressed.
  • Doing work on a gas increases its internal energy, so also increases the average energy of the molecules.
  • Temperature increases with an increase of average kinetic energy.
• What is work?

  The transfer of energy by a force.
• What does doing work on a gas increase?

  Internal energy.
• What can an increase in internal energy cause for a gas?

  Temperature increase.