Essential Chemistry for IGCSE - Chemical Reactions (Section 4 - No. 50)
Which of the following statements is true regarding a spontaneous reaction?
It will always proceed to completion rapidly.
It will always occur with no energy input.
It will occur without any outside intervention.
It will always produce products with lower energy than the reactants.
Explanation
A spontaneous reaction will occur naturally, without the need for external energy.
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