College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

Exercise 116

Two large heat reservoirs at temperatures 200 °C and 60 °C, respectively, are brought into thermal contact, and 1.50 × 10 3 J of heat spontaneously flows from one to the other with no significant temperature change. (a) The change in the entropy of the two-reservoir system is (1) positive, (2) zero, (3) negative. Explain. (b) Calculate the change in the entropy of the two-reservoir system.