Julie buys a new moped. She travels 3km south and then 4 km est. How far does she need to go to get back to where she started?​

The answer is c. valence electrons

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.