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Q.

If a reaction A+B⟶C is exothermic to the extent of 30 kJ/mol and the forward reaction has an activation energy of 70 kJ/mol, the activation energy for the reverse reaction is

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a

30 kJ/mol

b

70 kJ/mol

c

100 kJ/mol

d

40 kJ/mol

answer is D.

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Detailed Solution

ΔH=(Ea)f−(Ea)b−30=70−(Ea)b(Ea)b=70+30=100J

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