For an endothermic reaction, energy of activation is E_a and enthalpy of reaction is H (both of these in kJ/mol). Minimum value of E_a will be:

NEET 2010 Chemistry question

For an endothermic reaction, energy of activation is and enthalpy of reaction is (both of these in kJ/mol). Minimum value of will be:

(1)less than
(2)equal to
(3)more than Correct
(4)equal to zero

Answer: (3)

Solution

On the potential energy diagram of an endothermic reaction the products lie higher in energy than the reactants by (). The activation energy of the forward reaction is measured from the reactants up to the top of the barrier, which is above the products, while that of the reverse reaction is

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Question ID VK-090517