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5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
For the reaction$C{H_3}COOH(l) + 2{O_2}(g)$ $\rightleftharpoons$ $2C{O_2}(g) + 2{H_2}O(l)$ at ${25\,^o}C$ and $1 \,atm$ . pressure, $\Delta H = - 874\,kJ.$ Then the change in internal energy $(\Delta E)$ is ….$kJ$
  • ✓
    $-874 $
  • B
    $-871.53$
  • C
    $-876.47$
  • D
    $+ 874$
✓

Answer

Correct option: A.
$-874 $
(a)For this reaction $\Delta n = 0$ than $\Delta E = \Delta H.$

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