Enthalpy of Water Calculator:
Enter the values of mass, m(kg), specific heat capacity, C(kJ/kg.C) and temperature change, T(C) to determine the value of Enthalpy of water, H(kJ).
Enthalpy of Water Formula:
Enthalpy of water is a measure of the total heat content of water, accounting for the internal energy of the water and the work done to make room for it by displacing its environment.
Enthalpy is crucial in various thermodynamic processes, such as heating, cooling, and phase changes of water.
More water (higher mass) naturally holds more thermal energy, reflected in a higher enthalpy (H) value.
This constant value is specific to water and signifies how readily its temperature changes with added heat. Water’s high specific heat capacity means it takes more energy to raise its temperature compared to other substances with lower C values.
The temperature directly affects the enthalpy. Hotter water (higher T) has a higher enthalpy (H) because it contains more thermal energy.
Enthalpy of water, H(kJ) in kilojoules is calculated by the product of mass, m(kg) in kilogram, specific heat capacity, C(kJ/kg.C) in kilojoules per kilogram degree Celsius and temperature change, T(C) in degree Celsius.
Enthalpy of water, H(kJ) = m(kg) * C(kJ/kg.C) * T(C)
H(kJ) = enthalpy of water in kilojoules, kJ.
m(kg) = mass in kilograms, kg.
C(kJ/kg.C) = specific heat capacity in kilojoules per kilogram degree Celsius, kJ/kg.C.
T(C) = temperature in degree Celsius, C.
Enthalpy of Water Calculation:
- Finding Enthalpy using Mass, Specific Heat Capacity, and Temperature Change:
Given: m(kg) = 2kg, C(kJ/kg.C) = 4.186 kJ/kg.C, T(C) = 30degree Celsius.
Enthalpy of water, H(J) = m(kg) * C(kJ/kg.C) * T(C)
H(kJ) = 2 * 4.186 * 30
H(kJ) = 251.16kJ.
- Finding Temperature Change using Enthalpy, Mass and Specific Heat Capacity:
Given: m(kg) = 5kg, C(kJ/kg.C) = 4.186 kJ/kg.C, H(kJ) = 500kJ.
Enthalpy of water, H(J) = m(kg) * C(kJ/kg.C) * T(C)
T(C) = H(J) / m(kg) * C(kJ/kg.C)
T(C) = 500 / 5 * 4.186
T(C) = 23.89degree Celsius.