Q36 / 150 · MHT CET 2022 (05 Aug Shift 1) · Chemistry

If $65 \mathrm{~kJ}$ of work is done on the system and it releases and it releases $25 \mathrm{~kJ}$ of heat. What is change in internal energy of the system?

A
$16.25 \mathrm{~kJ}$
Correct answer
B
$40 \mathrm{~kJ}$
C
$90 \mathrm{~kJ}$
D
$2.6 \mathrm{~kJ}$

Solution

$\begin{aligned} & \Delta E=\delta Q+\delta W \\ & =-25+65 \\ & =40 \mathrm{KJ}\end{aligned}$

Hence, the correct answer is option: 'B'.

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