how do i find the enthalpy of reaction?

Heat of Formation for MgO - Hess's Law PART 3A: Reaction between Magnesium and Hydrochloric Acid Mg(s)+2HCl(aq)MgCl2(aq)+H2(g) Mass of magnesium 0.0919 Moles of magnesium Volume of 1.0MHCl Moles of HCl Mass of 1.0MHCl solution d=1.017g/mL Mass of 1.0MHCl solt plus Mg (total mass) Initial temperature of HCl Change in temperature Heat of neutralization (qrnn) cs=4.02J/gC Show work q=0.13lg4.02JC59C=4.73J=0.47 Enthalpy of reaction (Hrnn) Determine the limiting reagent and show work