Question

For a reaction delta h=30 kj and delta s=60 j/k. Find the temperature above which reaction will be spontaneous

Answer 1

The temperature above which reaction will be spontaneous is 500 K

Explanation:

According to Gibbs equation:

$\Delta G=\Delta H-T\Delta S$

$\Delta G$ = Gibb's free energy change

$\Delta H$ = enthalpy change

T = temperature

$\Delta S$ = entropy change

A reaction is at equilibrium when $\Delta G$ = Gibb's free energy change is zero and becomes spontaneous when $\Delta G$ = Gibb's free energy change is negative.

$\Delta H=T\Delta S$

$30\times 1000J=T\times 60J/K$

$T=500K$

Thus the temperature above which reaction will be spontaneous is 500 K

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Answer 2

Answer:

500Kelvin

Explanation:

at equilibrium delta g is zero therefore delta h is equal to T*delta S