posted by tomi .
Zinc dissolves in acid according to the balanced equation.
Zn(s)+ 2H(aq)-> Zn(aq) + H2(g)
a sample of zinc is placed in a ice calorimeter. If 0.0657g of zinc causes a decrease of 0.109ml in the ice/water volume of the calorimeter, what is the enthalpy change, per mole of zinc, for the above reaction per mole of zinc.
.109mL times 3.68kJ released for every mL = .40112kJ released by reaction
3.68kJ is given already. It is the amount of energy released per mL
Take the calculated .401kJ and divide by moles of Zn which is mass\molar mass
This gives delta H per mol of Zn