The diagram represents a reaction Use the diagram to answer

The diagram represents a reaction. Use the diagram to answer the questions below. 150 . 100 -- 50F Reaction progress Is the reaction endothermic or exothermic? What is the activation energy of the reaction? exothermic O endothermic Number kJ/ mol

Solution

Here products energy is less than the reactants energy.

Hence H of the reaction is negative.

Therefore this reaction is exothermic reaction.

H = energy of Products - energy of Reactants

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Activation energy = transition state energy - reactants energy

Transition state energy is 150 kJ/mol

Reactants energy is 125 kJ/mol

Hence activation energy is

(150-125)kj/Mole = 25 kJ/mol