Energy Changes & Reversible Reactions (AQA GCSE Chemistry): Quizzes

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Energy Changes & Reversible Reactions
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How do energy changes in forward and backward reactions compare in reversible reactions?

They are opposing

What happens to energy in an exothermic reaction?

Energy is transferred to surroundings

What happens to energy in an endothermic reaction?

Energy is absorbed from surroundings

When is a reaction exothermic in terms of bond energies?

More energy released forming product bonds

When is a reaction endothermic in terms of bond energies?

More energy needed to break reactant bonds

What type of reaction is the formation of HIHI from H2H_2 and I2I_2?

Exothermic

What type of reaction is the decomposition of HIHI into H2H_2 and I2I_2?

Endothermic

If the forward reaction is exothermic, what is the backward reaction?

Endothermic

If the forward reaction is endothermic, what is the backward reaction?

Exothermic

Why is H2H_2 + I2I_2 → HIHI exothermic?

More energy released forming H-I bonds

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Rate of Reaction

Reversibility & Equilibrium

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Rate of Reaction

Reversibility & Equilibrium

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Rate of Reaction

Reversibility & Equilibrium

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Rate of Reaction

Reversibility & Equilibrium

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