The specific heat at constant volume for the monatomic argon is 0.075 kcal/kg-K, whereas its gram molecular specific heat is Cv = 29.8 cal/mol/K. The mass of the argon atom is The specific heat at constant volume for the monatomic argon is 0.075 kcal/kg-K whereas its gram molecular specific heat is Cv = 29.8 cal/mol/K. [...]