What is word equation for CaCl2(aq) + Na2SO4(aq)--> CaSO4(s) + NaCl(aq)

The answer is a i think

1= c 2= a or d3 = idk sorry 4= c5= c

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.