Work and heat are examples of 

For gases, isothermal compressibility (k) is equal to

The change in entropy (∂S) for reversible process is

Efficiency of a Carnot engine working between hot reservoir at temperature T₁ and sink reservoir at temperature T^₂ is

Thermochemistry is the study of the relationship between Chemical energy and 

Specific heat at a constant pressure (C_p) is defined by