Consider two closed systems A and B. System A contains 3000 kJ of thermal energy at 20°C, whereas system B contains 200 kJ of thermal energy at 50°C. Now the systems are brought into contact with each other. Determine the direction of any heat transfer between the two systems.

Explanation:

Given

System A contains 3000 kJ of thermal energy at and system B contains 200 kJ at

Heat always flow from high temperature to low temperature therefore heat will flow from B to A . Heat will flow until an equilibrium temperature  will establish between A and B.

At equilibrium Temperature of both A and B system is equal.

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