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  4. In an isothermal change of an ideal gas, Δ U=0. The change in heat energy Δ Q is equal to

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Q. In an isothermal change of an ideal gas, $\Delta U=0$. The change in heat energy $\Delta Q$ is equal to

Thermodynamics

Solution:

According first law of thermodynamics,
$\Delta Q=\Delta U+\Delta W$
$\Rightarrow \Delta Q=0+W=W$