potassium and chlorine react to form potassium chloride. a. it is a redox reaction, explain why. b. see if u can write a balanced equation for it.​

It changes food into energy that the organism can use.

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.