Comment on the following statements: (a) An exothermic reaction is always thermodynamically spontaneous. Reaction with `DeltaG lt O` always have an eq

Question

Comment on the following statements: (a) An exothermic reaction is always thermodynamically spontaneous. Reaction with `DeltaG lt O` always have an eq

Comment on the following statements:
(a) An exothermic reaction is always thermodynamically spontaneous.
Reaction with `DeltaG lt O` always have an equilibrium constant greater than `1`

Monjur Alahi

8 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - (a) When `DeltaH=-ve "and" TDeltaS`=- ve also `T DeltaS gt DeltaH` then `DeltaG`=+ ve in such case, the reaction will not be spontaneous.
(b) `-DeltaG^(@) =2.303 RT "log"K_(c)`
If `DeltaG_(@)` is negative (not to say that `DeltaG^(@) lt 0`) then `K_(c)` will be +ve and will have value greater than one.
When `DeltaH =-ve` and `T DeltaS =-ve `,also `TDeltaS gt DeltaH " then " DeltaG =+ ve` in such case, the reaction will not be spontaneous.
(b) `-DeltaG^(@) =2.303"RT log"K_(c)`
If `DeltaG^(@) ` is negative (not to say that `DeltaG^(@) lt O)` then `K_(c)` will be `+ve` and will have value greather than one.