How is constant volume heat capacity different from constant pressure? - Real Chemistry

In this video we compare constant volume heat capacity to constant pressure heat capacity. Constant volume heat capacity is the energy needed to raise the temperature of a system in a sealed container. Constant pressure heat capacity is the energy needed to raise the temperature of a system in an open container or piston. Because some heat transfered to a constant pressure system goes to work, constant pressure heat capacity is always larger than constant volume heat capacity for gasses. For an ideal gas: Cp = Cv + R. If PV work is zero, the two heat capacities are identical. For an introduction to heat capacity see:    • How to calculate temperature changes with ...   For calc based heat capacity see:    • Calculus based heat capacity - Real Chemistry