Question

Identify the incorrect statement

A : When K <1, DeltaG > 0

B: When DeltaG is positive, the reaction is non-spontaneous

C: When water forms ice, the entrophy of the system is negative

D: When water forms ice, the system absorbs enthalpy heat

E: All of the above are correct.

Please explain how you got to your answer!

Answer 1

Ans: D - Incorrect

A,B,C are correct

1) ∆G = -RT InK

When K < 1, ∆G >0

2)   ∆G = - ve , it is a spontaneous reaction

∆G = + ve , it is a non-spontaneous reaction

3) When water forms ice, the entropy of the system is negative.

This is due to, liquids have more entropy than solids.

order of entropy : gases > liquids > solids

4) When water forms ice, the system absorbs enthalpy heat - wrong

Formation of ice from water is a exothermic reaction. So the system releases heat energy.