If a reaction is endothermic and has a positive delta s, what should you do to the temperature in order to make sure the reaction will run spontaneously

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Chemistry

Ben Walker

16 December, 03:24

If a reaction is endothermic and has a positive delta s, what should you do to the temperature in order to make sure the reaction will run spontaneously

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Gary Spencer · Answer 1

Answer is: temperature must be increased to very high values.

The change in Gibbs free energy (ΔG), at constant temperature and pressure, is: ΔG=ΔH-TΔS.

ΔH is the change in enthalpy; in this example ΔH>0 ...

ΔS is change in entropy; ΔS>0.

T is temperature of the system.

When ΔG is negative, a reaction (occurs without the addition of external energy) will be spontaneous (exergonic).

TΔS > ΔH.