Consider two closed systems A and B System A contains 3000 k

Consider two closed systems A and B. System A contains 3000 kJ of thermal energy at 20 degree C, and system B contains 200 kJ of thermal energy at 50 degree C. Now the systems are brought into contact with each other. State the direction of heat transfer between the two systems (i.e., A-to-B or B-to-A).

Solution

Transfer of heat takes place from high temperature to low temperature region. Therefore, heat will transfer from System B to System A unless and untill bth reach equal temperatures