How many moles of solute are needed to prepare 16.0 ml of a 0.415 M Pb(NO3)2, solution? A .00664
B .0072
C 2.81
D 2.59

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.

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