Question

The molar mass of an unknown salt is 63.5. If 4.81 g is added to 81.1 mL of water the temperature changes from 20.95oC to 21.62oC. What is the molar heat of solution (J/mol) of the salt? (Assume all of the heat is transfered to the water) Express your answer to the nearest whole number (XXXX.).

Answer 1

mass H2O x specific heat H2O x (Tfinal-Tinitial) = q

dHsoln/g is q/4.81
dHsoln/mol is (q/4.81)* 63.4g/mol

Answer 2

Thanks for all the help Bob!