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, 24.01.2022 19:20

# Under what conditions is AG for a reaction always positive? A. When A His positive and AS is negative O B. When AH and AS are both negative C. When A His negative and ASis positive O D. When A Hand AS are both positive

## Step-by-step answers

Answered by an experienced expert Dr. Ranjana Bhatt

For any reaction to occur the relationship between change in Gibb's energy (âˆ†G) , change in enthalpy (âˆ†H) and change in entropy (âˆ†S) is as follows-

âˆ†G = âˆ†H- T âˆ†S

âˆ†G= Change in Gibb's energy

âˆ†H = Change in enthalpy

âˆ†S = Change in entropy

If ,

âˆ†H is positive and âˆ†S is negative -

âˆ†G = âˆ†H - T( -âˆ†S )

âˆ†G = âˆ†H + T âˆ†S

Hence, option A is correct

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