1. Defining thermal capacities
When a closed system receives, at constant volume, a quantity of heat Q
V
, its change in internal energy ΔU is equal to this quantity of heat :
When a closed system receives, at constant pressure, a quantity of heat Q
P
, its enthalpy variation ΔH is equal to this quantity of heat :
The definition of thermal capacity is very general...
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Defining thermal capacities
Thermal capacities of pure perfect gases
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