$A$ spontaneous process is impossible if ........

  • A
    $\Delta H > 0$ and $\Delta S > 0$
  • B
    $\Delta H < 0$ and $\Delta S < 0$
  • C
    $\Delta H < 0$ and $\Delta S > 0$
  • D
    $\Delta H > 0$ and $\Delta S < 0$

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Calculate the work done when $1 \text{ mole}$ of an ideal gas is expanded reversibly and isothermally from an initial pressure $P_1 = 10 \text{ bar}$ to a final pressure $P_2 = 1 \text{ bar}$ at a constant temperature $T = 300 \text{ K}$. $[R = 8.314 \text{ J K}^{-1} \text{ mol}^{-1}]$ (in $\text{ kJ}$)

$A$ process has $\Delta H = 200 \ J \ mol^{-1}$ and $\Delta S = 40 \ J \ K^{-1} \ mol^{-1}$. Choose the minimum temperature above which the process will be spontaneous.

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