For a spontaneous chemical process, the free energy change is A. Positive B. Negative C. Zero D. Depends on whether the reaction is exothermic or endothermic

The correct answer is B. Negative.

Free energy is

a measure of the amount of energy available to do work in a chemical reaction. A negative free energy change indicates that the reaction is spontaneous, meaning that it will occur without any input of energy. A positive free energy change indicates that the reaction is non-spontaneous, meaning that it will not occur unless energy is input into the system. A free energy change of zero indicates that the reaction is at equilibrium, meaning that there is no net change in the system.

In an exothermic reaction, heat is released, which means that the system is losing energy. This makes the reaction more likely to occur, and so the free energy change is negative. In an endothermic reaction, heat is absorbed, which means that the system is gaining energy. This makes the reaction less likely to occur, and so the free energy change is positive.

Therefore, for a spontaneous chemical process, the free energy change must be negative.