This video lecture from Thermochemistry (F.Sc. Chemistry Book 1) covers the concept of the Enthalpy and the derivation of the equations of enthalpy in terms of internal energy and pressure volume work, and deriving the equation of enthalpy at constant pressure along with a solved example. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.