# Heat Capacity at Constant Pressure (Cp)

**Formula:** `Cp = n × Cp_m`

The heat capacity at constant pressure (Cp) is the amount of heat required to raise the temperature of a substance by one degree Celsius at constant pressure. The formula is the product of the number of moles ** n** and the molar heat capacity at constant pressure

**, which is specific to each substance and measured in J/(mol·K). For instance, for water, Cp_m is approximately 75.3 J/(mol·K). The units for**

*Cp_m**Cp*are thus joules per kelvin (J/K) because it is the product of moles (dimensionless) and the molar heat capacity (J/(mol·K)). This formula can be used for calculating the heat capacity of gases, which can then be applied to various practical applications, including the analysis of engine efficiency and other thermodynamic processes.

Tags: Thermodynamics, Heat Capacity, Constant Pressure, Cp