What is the basic information regarding enthalpy?

Question

What is the basic information regarding enthalpy?

Answer 1

check this out http://en.wikipedia.org/wiki/Enthalpy

also read a thermodynamic book.

Answer 2

In the analysis of certain types of processes, particularly in power generation and refrigeration we frequently encounter the combination of properties U+PV.where U is the internal energy P is the pressure & V is the volume of the substance. For the sake of simplicity and convenience this combination is defined as a new property enthalpy and given the symbol H

H=U+PV

Answer 3

Enthalpy is a measure of heat energy (Joules), or heat energy density (Joules/kg, Joules/mol) usually associated with the state change of a material (solid-to-liquid, liquid-to-gas).  That is, the amount of heat it takes to change 'x' amount of material from one state to another.

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