Question

Which statement is true about the relationship between entropy and spontaneity? O Spontaneous reactions tend to lead to higher entropy. O Entropy is the same as spontaneity. As entropy increases, spontaneity decreases. o As entropy increases, spontaneity is unaffected. nics?

Answer 1

Spontaneous reactions result in an increase in entropy, aligning with the second law of thermodynamics.

Step-by-step explanation:

The true statement about the relationship between entropy and spontaneity is: Spontaneous reactions tend to lead to higher entropy. This concept is encapsulated by the second law of thermodynamics, which states that all spontaneous changes cause an increase in the entropy of the universe. The increase in entropy relates to how energy and matter become more spread out and disordered over time in a spontaneous process, such as a chemical reaction or heat flow between two objects.

Answer 2

The true statement is: Spontaneous reactions tend to lead to higher entropy.

Step-by-step explanation:

The spontaneity of a reaction is linked to the value of Gibbs free energy (ΔG°). The more negative is this value, the more spontaneous is a reaction. At the same time, Gibbs free energy depends on enthalpy (ΔH°) and entropy (ΔS°), according to the following expression:

ΔG° = ΔH° - T.ΔS°

We can see that higher entropies (higher ΔS°) lead to more negative ΔG°, thus, more spontaneous reactions.