Thermodynamics

$\Delta_r H^{\ominus}=$ negative; $\Delta_r S^{\ominus}=$ positive: spontaneous at all temperatures

$\Delta_1 H^{\ominus}=$ negative; $\Delta_1 S^{\ominus}=$ negative; non-spontaneous at low temperatures

$\Delta_r H^{\ominus}=$ positive; $\Delta_r S^{\ominus}=$ positive; non-spontaneous at low temperatures

$\Delta_r H^{\ominus}=$ negative; $\Delta_r S^{\ominus}=$ negative: spontaneous at low temperatures