What is a mole? * A. A unit of counting equal to 6.02x10^23 objects
B. The SI unit for measuring the mass of a sample equal to 6.02x10^23 grams
C. The mass of one atom of any element
D. The mass of one atom of carbon-12, and no other element

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.

; lc