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STD 11 - 5. Thermodynamics and thermochemistry — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 5. Thermodynamics and thermochemistry4 Marks
MCQ
Which is not the correct relation between enthalpy $(\Delta H)$and intrinsic energy $(\Delta E)$
  • A
    $\Delta H = \Delta E + \,P\,\Delta V$
  • B
    $\Delta H\, = \,\Delta E\, + \,n\,RT$
  • ✓
    $\Delta H = \Delta E\, - \,P\,\Delta V$
  • D
    $\Delta E = \Delta H\, - \,P\,\Delta V$
✓

Answer

Correct option: C.
$\Delta H = \Delta E\, - \,P\,\Delta V$
c
$\Delta H=\Delta E+P \Delta V \rightarrow(a)$

$\Rightarrow \Delta E=\Delta H-P \Delta V \rightarrow$ (d)

Also $\Delta H=\Delta E+\Delta n_gRT$ or

$=\Delta E+n RT \rightarrow(b)$

$\Delta H=\Delta E-P \Delta V$ is bonding relation

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