Editing Volumetric heat capacity (section)

== Constant volume and constant pressure ==

For gases it is necessary to distinguish between volumetric heat capacity at constant volume and volumetric heat capacity at constant [[pressure]], which is always larger due to the pressure–volume work done as a gas expands during heating at constant pressure (thus absorbing heat which is converted to work). The distinctions between constant-volume and constant-pressure heat capacities are also made in various types of [[specific heat capacity]] (the latter meaning either mass-specific or mole-specific heat capacity).