Final answer:
Spontaneity of a reaction at different temperatures can be predicted by the value of ΔG, the change in Gibbs free energy, at constant temperature and pressure.
Step-by-step explanation:
Spontaneity of a reaction at different temperatures can be predicted by the value of ΔG, the change in Gibbs free energy, at constant temperature and pressure.
A reaction is spontaneous at all temperatures if ΔG is negative. This means that the reaction will occur spontaneously and proceed in the forward direction without any external influence.
At low temperatures, a reaction will be spontaneous if ΔG is negative. This indicates that the reaction is favorable and will proceed forward without any external influence.
At high temperatures, a reaction will not be spontaneous if ΔG is positive. This means that the reaction is not favorable and will not occur spontaneously.
Overall, a reaction can be spontaneous at all temperatures, low temperatures, or be non-spontaneous at high temperatures, depending on the value of ΔG.