Entropy definition ()=() Clausius in 1865 Path A and B are arbitrary Prof.Hu gangfu 1923熵(during Plank visiting China) has the same value for any internally reversible process A only depends on the states 0 A kind of property Selecting "S"to denote this property,give it a name "entropy s Entropy is an extensive property. SI unit for entropy is J/K 上游充通大学 April 18,2018 8 SHANGHAI JLAO TONG UNIVERSITYApril 18, 2018 8 Entropy definition Path A and B are arbitrary 2 1 Q T   • has the same value for any internally reversible process • only depends on the states A kind of property Selecting “S” to denote this property, give it a name “entropy” Entropy is an extensive property. Clausius in 1865 SI unit for entropy is J/K ref Q S T    Prof. Hu gangfu 1923 熵 (during Plank visiting China)