What is a measure of the level of disorder in a chemical system?

Q. Sickle cell anaemia is a disorder caused due to change in chemical nature of

Q. Entropy is a measure of disorder, explain.

Q.

The EMF of a chemical cell is positive when free energy change of reaction

Q. All biochemical pathways involve changes in free energy, and the graph below illustrates one type of free energy change between reactants and products in a chemical reaction.
Which statement is a correct interpretation of the graph?

Q. A. $\Delta G$ is net energy available to do useful work and is thus a measure of "free energy". Show mathematically that $\Delta G$ is a measure of free energy.

B. Find the unit of $\Delta G$. If a reaction has positive enthalpy change and positive entropy change, under what condition will the reaction be spontaneous?