Q15 / 150 · MHT CET 2022 (07 Aug Shift 2) · Chemistry

What is change in internal energy system does $140 \mathrm{KJ}$ of work on surrounding and $40 \mathrm{~kJ}$ of heat is added to system?

  • A
    $-200 \mathrm{~kJ}$
  • B
    $-180 \mathrm{~kJ}$
  • Correct answer
    C
    $-100 \mathrm{~kJ}$
  • D
    $-280 \mathrm{~kJ}$

Solution

$\begin{aligned} & \Delta \mathrm{E}=\delta \mathrm{W}+\delta \mathrm{Q} \\ & =-140+40=-100 \mathrm{KJ}\end{aligned}$

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

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