Which statement describes a chemical reaction? · atoms in the products are rearranged to form new substances · atoms in the reactants are rearranged to form new substances · atoms in the products change into new atoms to form new substances · atoms in the reactants change into new atoms to form new substances

The answer to this is B

A chemical reaction is defined as the process in which the reareangements of molecular or iconic structure of a substance happens. In a chemical reaction there is not always a physical change or a nuclear reaction. Based on this we say that the reactants in a chemical reaction are rearranged to create new susbtances. The atoms in itself do not change simply rearrange or move about if they were to change then it would be a different starting material.

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

It was ernest rutherford