A mass of 45.0g of molten silver at its melting point is poured into 750mL of calorimeter water at 25.0C. The final temperature reached by both is 30.0C. If the specific heat capacity of silver is 0.235 kJ/kgC, calculate the molar heat of solidification of silver.

Answer 1

heat produced by solidification + heat lost by Ag cooling + heat gained by calorimeter water = 0

[mass Ag x Hvap] + [mass Ag x specific heat Ag x (Tfinal-Tinitial)] + [mass H2O x specific heat H2O x (Tfinal-Tinitial)] = 0

Answer 2

That first terms of [mass Ag x Hvap] should be a negative term. I omitted the - sign in front of it.

Answer 3

21 100