Gibbs Free Energy (HSC SSCE Chemistry): Quizzes

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Gibbs Free Energy
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What two factors does Gibbs free energy combine to predict reaction spontaneity?

Enthalpy and entropy

What is the equation for standard Gibbs free energy change?

ΔG°=ΔH°TΔS°\Delta G° = \Delta H° - T\Delta S°

What are the units of ΔS°\Delta S° in the Gibbs equation?

J K1mol1\text{J K}^{-1}\text{mol}^{-1}

Under standard conditions, at what pressure must gases be?

100.0 kPa

If ΔG°\Delta G° is negative, what happens to the reaction?

Proceeds in the forward direction

If ΔG°\Delta G° is positive, what happens to the reaction?

Proceeds in the reverse direction

Which type of reaction occurs immediately when reactants are mixed at room temperature?

Type 1

What do Type 2 reactions require to begin?

Initial activation like a spark or match

What characterises Type 3 reactions?

Require continuous heating throughout

When ΔH°\Delta H° is in kJ, what factor converts ΔS°\Delta S° from J to kJ?

10310^{-3}

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