cy Cp and Gas Constant Ideal gas:h u +pv =u +RT differentiating +R 'dT Mayer's formula c(T)=c(T)+R (ideal gas) On molar basis cp(T)=c(T)+R (ideal gas) 上游究通大学 March 19,2019 3 SHANGHAI JLAO TONG UNIVERSITYMarch 19, 2019 3 cv , cp and Gas Constant Ideal gas: h = u +pv =u +RT d d d d h u R T T   cp cv ( ) ( ) (ideal gas) p v c T c T R   On molar basis c T c T R p v ( ) ( ) (ideal gas)   p v p v c c c c   Mayer’s formula differentiating