This video lecture from Heat and Thermodynamics (F.Sc. first year physics) covers the relationship between Cp and Cv by using the concept of 1st law of thermodynamics and some numerical examples relating with Cp_Cv=R and also you will learn the reason that why specific heat at constant pressure is greater than specific heat at constant volume.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.