Q4 / 100 · BITSAT 2024 (Memory Based Paper 2) · Chemistry

Which of the following relation is not correct?

  • Correct answer
    A
    $\Delta \mathrm{H}=\Delta \mathrm{U}-\mathrm{P} \Delta \mathrm{V}$
  • B
    $\Delta \mathrm{U}=\mathrm{q}+\mathrm{W}$
  • C
    $\Delta \mathrm{S}_{\mathrm{svs}}+\Delta \mathrm{S}_{\mathrm{surr}} \geq 0$
  • D
    $\Delta G=\Delta H-T \Delta S$

Solution

$\mathrm{H}=\mathrm{U}+\mathrm{PV}$ (By definition) $\Delta \mathrm{H}=\Delta \mathrm{U}+\Delta(\mathrm{PV})$ at constant pressure $\Delta H=\Delta U+P \Delta V$

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

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