Question

16.   Gibb's Free Energy is
a.   the spontaneous energy of a reaction
b.   the chemical energy that can be used for performing work
c.   the non-spontaneous energy of a reaction
d.   the amount of activation energy needed for a reaction to start

21. Based on the ∆G calculation, a student determined that a synthesis reaction should be spontaneous. When the student tries out the reaction, however, nothing happens. Which explanation is most plausible?
    1. the student probably made a mistake in the calculation
    2. the activation energy is high
    3. the student got confused about the sign of ∆G
    4. the temperature is not high enough

Answer 1

16. Gibb's free energy is

Correct option (B) the chemical energy that is can be used for performing work .

Gibb's free energy is the chemical energy that is linkee to perform a work.

∆G =∆H-T∆S

Where ∆G = gibbs free energy

∆H = enthalpy change

T = Temperature

∆S = entropy change

Question :Most plausible answer is ;

Correct option (c) the student got confused about the sign of ∆G

∆G = negative (spontaneous)

∆G = positive (non spontaneous)

When student doing calculation he mistakenly write negative intead of positive which was actually positive So when he was performing reaction it is not happening because it is not spontaneous (beacuse ∆G is actually positive).