Question

For a hypothetical chemical reaction \( A_2 + 3B_2 \rightarrow 2AB_3 + \text{Heat} \), which one of the following combinations of state variables would support the spontaneity of the reaction at a particular temperature?

• A. \( \Delta H 0, \Delta G > 0 \)
• B. \( \Delta H > 0, \Delta S > 0, \Delta G < 0 \)
• C. \( \Delta H > 0, \Delta S < 0, \Delta G < 0 \)
• D. \( \Delta H > 0, \Delta S 0 \)

Hint:

For spontaneity, remember the Gibbs free energy equation: \( \Delta G = \Delta H - T \Delta S \). Spontaneity occurs when \( \Delta G \) is negative, and this depends on both enthalpy and entropy.

Answer 1

The Correct Option is B