△u,△h,cy,and cp relations for ideal gas ideal gas:uAT);hfT) kJ/kg.K →c,definition: du c,(T)= (ideal gas) 0 du=c,(T)dT ()-u()c(TdT (ideal gas) dh →C,definition: dT (ideal gas) The key is to ↓ find c,(T dh=c,(T)dT and cp(T) h()h()TdT Adeal gas) 上游充通大学 March 21,2018 2 SHANGHAI JLAO TONG UNIVERSITYMarch 21, 2018 2 Δu, Δh, cv , and cp relations for ideal gas ideal gas: u~f(T); h~f(T) cv definition:  cp definition: d ( ) (ideal gas) d v u c T T  ( )d v du c T T  d ( ) (ideal gas) d p h c T T  d ( )d p h c T T  2 1 2 1 ( ) ( ) ( )d (ideal gas) T v T u T u T c T T    2 1 2 1 ( ) ( ) ( )d (ideal gas) T p T h T h T c T T    The key is to find cv(T) and cp(T) kJ/kg·K