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Question

Identify the complete and correct statement of the first law of thermodynamics. 

A.

During a process, extracting work without supplying heat, while sacrificing the energy of the system.

B.

Difference between the heat and work interactions during a process, which is property of the system. 

C.

When a closed system executes a complete cycle, the sum of heat interactions is equal to the sum of work interactions.

D.

When a system undergoes a cycle, the integral of heat is equal to the integral of work.

Answer ( Option C)

When a closed system executes a complete cycle, the sum of heat interactions is equal to the sum of work interactions.

Solution

First law of thermodynamics states that when a closed system executes a complete cycle, the sum of heat interaction is equal to the sum of work interaction.

Hence, the correct option is (C).

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