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System, Surroundings, Intensive, Extensive Properties

If a reaction...

Question

If a reaction has del G= -ve then reaction will be feasible, exothermic, spontaneous?. A reaction having del G =+ ve means it is thermodynamically impossible so it will not occur? Am I right

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Solution

Dear student
When ΔG = -ve the reaction is spontaneous

When ΔG = +ve the reaction can also happen , but it will have a lower equilibrium constant.[N₂ + O₂ $\to$ NO₂ is such a reaction]

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C r_{2} O_{3} + 2 A l \to A l_{2} O_{3} + 2 C r (△ G^{0} = - 421 k J)

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System, Surroundings, Intensive, Extensive Properties

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