A2.0-kg block of ice originally at 263 k is placed in thermal contact with a block of silver which is initially at 473 k. the h2o - silver system reaches equilibrium at a temperature of 323 k. the system is insulated so no heat flows into or out of it. find the mass of the block of silver. (use cag = 230 j/kg-k, cwater = 4200 j/kg-k, cice = 2100 j/kg-k, and lf = 3.3×105 j/kg.)