IIT JEE , AIEEE Forum - Chemistry , Physical Chemistry - In endothermic reactions when componds are heated after than energy will emit/release or n

Suraj.mukhi2008

ase we know if any element absorb energy than it become un stable what happen in endothermic reaction?

dev_22oct

Endothermic reactions are the one in which energy is required.

for them

H of the reaction is +ve.

eg.

In body, respiration is a process in which energy is required(ie endothermic) and need is fullfilled by conversion of ATP to ADP.

dev_22oct

dear for a process to be unstable we have to check the

G values as

H is not the sole criteria to define the spontaneous nature of a reaction.

G must be -ve .

srinathmurthy

There is an absorption of energy in an endothermic reacn.

We cannot say that the products formed are unstable or not , the factor which decides whether the reacn. really proceeds or is an hypothetical one is the FREE ENERGY CHANGE of the system i.e.

G =

H - T

S

if

G is -ve then reacn. proceeds whatever be the type of reacn.

H is the enthalpy change.

S is the change in entropy. T is the temp. at which reacn. is taking place.

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