Question

If the enthalpy of reactants is 70
J/Kg and enthalpy of products is 35
J/kg, what is the valueof heat of
reaction?​

Answer 1

Answer:

Spontaneous reactions have negative free energy change and non spontaneous reactions have positive free energy change.

ΔG=ΔH−TΔS.

Substitute values in the above expression.

ΔG=−11.7×103Jmol−1−298K×−105Jmol−1K−1=19590Jmol−1

Since, the gibbs free energy change is positive, the reaction is non spontaneous.