Question

From 1' law of thermodynamics show that a mathematical relationship between the enthalpy and
the internal energy for an ideal gas is given by:
AH = AU + AnRT
​

Answer 1

The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes, distinguishing two kinds of transfer of energy, as heat and as thermodynamic work, and relating them to a function of a body's state, called Internal energy.