Can an enzyme make a nonspontaneous reaction occur spontaneously? Why or why not?

The correct answer is that an enzyme cannot change a non-spontaneous reaction to a spontaneous one.

Explanation:

Enzymes are proteins that catalyze chemical reactions in living things. They are substances that, without being consumed in a reaction, notably increase their speed.

As with all catalysts, enzymes do not alter the chemical balance of the reaction. Generally, in the presence of an enzyme, the reaction moves in the same direction as it would in the absence of an enzyme, only faster.

So we conclude that an enzyme can only increase the speed of the reaction, not make it spontaneous.

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