Chemistry

# A chemical reaction that proceeds spontaneously _____. must run in the direction that lowers the free energy must produce products that are more ordered than the reactant molecules must proceed without an input of external energy must take place in a very short amount of time

#### ElizbethLiddle208

2 years ago

To answer the question above, remember that the chemical reactions that proceed spontaneously need not have an external energy to drive the reaction. Therefore the answer to this item is the third choice, "must proceed without an input of external energy".