Q15 / 155 · WBJEE 2020 · Chemistry

An ideal gas expands adiabatically against vaccum. Which of the following is correct for the given process?

  • A
    $\Delta S=0$
  • B
    $\Delta \mathrm{T}=-\mathrm{ve}$
  • Correct answer
    C
    $\Delta \mathrm{U}=0$
  • D
    $\Delta \mathrm{P}=0$

Solution

Hint: For adiabatic free expansion of an ideal gas $\mathrm{dq}=0$ $\mathrm{dU}=0$ $\mathrm{dH}=0$ $\mathrm{dT}=0$

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

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