Chemistry questions
both of them

Kay so the first one of gasoline it's answer is fractional distillation and the second one im not really sure, either 2 or 4

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.