The total internal energy change for a reversible isothermal cycles is

Always 100 calories per degree

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Always negative

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Always positive

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Solution

The correct option is C \N
$Δ E = n C_{v} Δ T = 0$ for isothermal reversible cycle. This is because in an isothermal process, the temperature remains constant.

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When the total energy change in an isothermal cycle is zero, it represents

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