Overall mass balance for dilution process. a well-stirred storage vessel contains 1 kg of solution of a dilute methanol solution (wa 0.05 mass fraction alcohol).

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.

C. chemical changeshope i : )