define the term enthalpy
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a thermodynamic quantity equivalent to the total heat content of a system is equal to the internal energy of the system + the product of pressure and volume
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Explanation:
Enthalpy-: It is the addition of pressure volume (PV) and the internal energy.
* It is denoted by "H".
* Term enthalpy is just like internal energy. This term was introduced because mostly all chemical reactions are done at constant pressure for that we use the term internal energy.
* It is an extensive property.
* It is a state function.
* We cannot find the absolute value of enthalpy we can only find the change in enthalpy or ∆H.
* Mathematically it is written as H = E + PV
where, H is the enthalpy, E is the internal energy finally PV is pressure and volume.
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