Which statement describes a reaction at 298 K if AH = 31 kJ/mol, AS = 0.093 kJ/(mol-K)?
A. It is at equilibrium.
B. It is not spontaneous.
C. It is exothermic.
D. Gibbs free energy is negative.

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)