Question

What is a spontaneous change? What role does kinetics play in determining the apparent spontaneity of a chemical reaction? Select all that apply.

A spontaneous change occurs by itself, without continued outside assistance.

Kinetics plays no role in determining if a change is spontaneous.

A spontaneous change occurs only with continued outside assistance.

In thermodynamic terms, a spontaneous change has anegative ΔG.

Kinetics must be considered when determining if a change is spontaneous.

In thermodynamic terms, a spontaneous change has apositive ΔG.

Answer 1

Spontaneous change is change which occurs by itself, without outside assistance.

Chemically, when we use the term spontaneous, we are referring to any change that moves a system toward equilibrium. The another term for it is "feasibility "

Among the points mentioned:--

1.A spontaneous change occurs by itself, without continued outside assistance.

2.Kinetics plays no role in determining if a change is spontaneous. => Kinetics deal with the speed or rate of a reaction. The term spontaneous does not imply anything about the speed or rate, it just say the reaction will proceed. It doesn't claim anything about rate of a reaction.

3. In thermodynamic terms, a spontaneous change has a negative ΔG. => for a reaction to be spontaneous the del G has to be negative for sure. The tendency to achieve minimum energy. The reaction will proceed in that direction where the del G value is negative.