Question

When is a reaction favourable ... please explain....

Answer 1

Hii Friend,

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Here is ur ans,

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In reactions in which enthalpy is favorable and entropy is unfavorable, the reaction becomes less spontaneous ( G increases) until eventually the reaction is not spontaneous (when G > 0).

Hope it will help u.

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Answer 2

Hey mate here is ur query..

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For favourable conditions of any reactions following conditions should be satisfied..

1.when product is more stable than reactants..
2.When chemical reactions that occur spontaneously usually give off energy, usually heat. .
The extra energy is given off as heat and/or sometimes light. The products are more stable than the reactants.

if we are talking about enthalpy then

the reactions in which enthalpy is favorable and entropy is unfavorable, the reaction becomes less spontaneous ( G increases) until eventually the  reaction is not spontaneous (when G > 0)
i.e G =Gibbs free energy

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Hope this will help you...