A certain system is exothermic by $260 \mathrm{~kJ}$ and does $10 \mathrm{~kJ}$ of work. What is the change…

A certain system is exothermic by $260 \mathrm{~kJ}$ and does $10 \mathrm{~kJ}$ of work. What is the change in internal energy?
  1. $-250 \mathrm{~kJ}$
  2. $-540 \mathrm{~kJ}$
  3. $-140 \mathrm{~kJ}$
  4. $-270 \mathrm{~kJ}$

Solution

$\begin{aligned} & \Delta E=8 Q+8 W \\ & =-260+(-10) \\ & =-270 \mathrm{KJ}\end{aligned}$

Asked in: MHT CET 2022 (06 Aug Shift 1)

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