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Question
In a cyclic process, if ΔU = internal energy, W = work done, Q = Heat supplied then ______.
Options
ΔU = Q
Q = 0
W = 0
W = Q
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Solution
In a cyclic process, if ΔU = internal energy, W = work done, Q = Heat supplied then W = Q.
Explanation:
In a cyclic process, the system returns to its initial state at the end of the cycle. Since the internal energy (ΔU) depends only on the state of the system, the change in internal energy over one complete cycle is:
ΔU = 0
From the first law of thermodynamics:
Substituting ΔU = 0
Q = W
Thus, in a cyclic process, the heat supplied to the system (Q) is equal to the work done by the system (W).
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