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Question

What is the value of H?


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Solution

Enthalpy:

  • The enthalpy of a system is represented by ‘H’.
  • Enthalpy of a substance is defined as the energy stored in a substance and which is available for conversion in heat is known as enthalpy or heat content of a substance.
  • Enthalpy change of a system is defined as the heat gained or lost by the system at constant pressure.
  • The formula for the calculation of enthalpy change can be represented as: ∆H=∆U+P∆V, where∆H is the change in enthalpy, ∆U is the change in internal energy, P is the pressure, and ∆V is the volume.
  • The unit of enthalpy is kJmol-1

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