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Work Done in Isothermal Reversible Process

Question

In an isothermal change of an ideal gas, $Δ U = 0$ . The change in the heat energy $Δ$ Q is equal to
$0.5 W$
$2 W$
$w = q = Δ U = 0$
$1.5 W$

A

W

B

0.5 W

C

1.5 W

D

2 W

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Solution

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$d Q = d U + W$

$∵$ At isothermal condition $d U = 0$
Hence $d Q = W$

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