The correct answer is "free energy is absorbed."

In thermodynamics, a reaction is considered spontaneous if it results in a decrease in free energy (Gibbs free energy). If free energy is absorbed (or if the change in free energy is positive), the reaction is not spontaneous.

While the other options can influence whether a reaction is spontaneous or not, they are not definitive. For example, a reaction can absorb heat (be endothermic) and still be spontaneous if it is accompanied by a large increase in entropy. Similarly, the rate of reaction does not determine spontaneity; it only tells us how quickly a reaction occurs. Lastly, while a decrease in entropy can make a reaction less likely to be spontaneous, it is not a definitive factor because the change in enthalpy (heat energy) also plays a role.

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The correct answer is "free energy is absorbed."

In thermodynamics, a reaction is considered spontaneous if it results in a decrease in free energy (Gibbs free energy). If free energy is absorbed (or if the change in free energy is positive), the reaction is not spontaneous.

While the other options can influence whether a reaction is spontaneous or not, they are not definitive. For example, a reaction can absorb heat (be endothermic) and still be spontaneous if it is accompanied by a large increase in entropy. Similarly, the rate of reaction does not determine spontaneity; it only tells us how quickly a reaction occurs. Lastly, while a decrease in entropy can make a reaction less likely to be spontaneous, it is not a definitive factor because the change in enthalpy (heat energy) also plays a role.

Knowee AI · Accepted Answer

The correct answer is "free energy is absorbed."

In thermodynamics, a reaction is considered spontaneous if it results in a decrease in free energy (Gibbs free energy). If free energy is absorbed (or if the change in free energy is positive), the reaction is not spontaneous.

While the other options can influence whether a reaction is spontaneous or not, they are not definitive. For example, a reaction can absorb heat (be endothermic) and still be spontaneous if it is accompanied by a large increase in entropy. Similarly, the rate of reaction does not determine spontaneity; it only tells us how quickly a reaction occurs. Lastly, while a decrease in entropy can make a reaction less likely to be spontaneous, it is not a definitive factor because the change in enthalpy (heat energy) also plays a role.

Reactions are NOT spontaneous if:Group of answer choicesfree energy is absorbedheat is absorbedthe rate of reaction is slowentropy decreased

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