If $\Delta H > 0$ and $\Delta S > 0$,the reaction can proceed spontaneously at:

  • A
    low temperature
  • B
    high temperature
  • C
    all temperatures
  • D
    will never be spontaneous

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Calculate the value of $\Delta G$ for the following reaction: $N_2O_{4(g)} \longrightarrow 2NO_{2(g)}$ if $\Delta H = 57.44 \ kJ$ and $\Delta S = 176 \ J \ K^{-1} \ mol^{-1}$ at $300 \ K$. (in $kJ$)

The effect of temperature on the spontaneity of reactions is represented as follows:
ConditionDetails
$A$. $\Delta H: +, \Delta S: -$$T$: any $T$, Spontaneity: Non-spontaneous
$B$. $\Delta H: +, \Delta S: +$$T$: low $T$, Spontaneity: Non-spontaneous
$C$. $\Delta H: -, \Delta S: -$$T$: low $T$, Spontaneity: Spontaneous
$D$. $\Delta H: -, \Delta S: +$$T$: any $T$, Spontaneity: Spontaneous

Which of the above conditions are correctly matched?

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