A 32.5 g iron block, initially 22.7 C, is submerged into an unknown mass of water at 63.2 C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 59.5 C. What is the mass of the water? The specific heat capacity of water is 4.184 J/ gC. The specific heat capacity of iron is 0.450 J/ gC.