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Calculate the change in internal energy of the system if $37.6 \mathrm{~J}$ of work is done by the system with heat loss of $14.6 \mathrm{~J}$ ?
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The correct answer is:
$-52.2 \mathrm{~J}$
From I $^{\text {st }}$ law of thermodynamic
According to $\mathrm{I}^{\text {st }}$ law of thermodynamics
$\begin{aligned} & \Delta \mathrm{E}=\delta \mathrm{Q}+\delta \mathrm{W} \\ & =-14.6+(-37.6) \\ & =-52.2 \mathrm{KJ}\end{aligned}$
According to $\mathrm{I}^{\text {st }}$ law of thermodynamics
$\begin{aligned} & \Delta \mathrm{E}=\delta \mathrm{Q}+\delta \mathrm{W} \\ & =-14.6+(-37.6) \\ & =-52.2 \mathrm{KJ}\end{aligned}$
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