1. Cyclohexane has a freezing point of 279.65 K. A solution of 29.5 g
of a solute in 1,000 g of cyclohexane has a freezing point of
277.33 K. What is the molar mass of the solute? (Kf 20.2 K/m)
a 255.15 g/mol
b 256.15 kg/mol
c 255.85 g/mol
d 256.85 g/mol

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)