Question

5. Calculate the change in entropy, Gibbs energy and enthalpy in the process of assimilation in the human body of sucrose, which is reduced to its oxidation.

Answer 1

Answer:

The relationship between the Gibbs free energy change ΔG, the enthalpy change ΔH and the entropy change ΔS is as shown.

ΔG=ΔH−TΔS But ΔH=2.0Kcal=2000.0cal ΔS=20calK

−1

T=298K

Substitute values in the above expression

ΔG=2000.0−298×20calK

−1

=−3960.0 =−ve,

hence spontaneous.

Note: For a spontaneous process, the free energy change is negative. For equilibrium process, the free energy change is zero and for non spontaneous process, free energy change is positive.