If a sample of methane occupies 584. mL at 3.91 atm, what volume (in mL) of oxygen gas at the same temperature and pressure is required to complete the reaction

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.

There are no metaphors.