0.35 g of MgO(s) reacts completely with 50.0 g of HCl(aq). The temperature increases 6.24 C. Assuming the specific heat of the solution is 4.18 J/g∙oC, calculate ΔHrxn for:
MgO(s) + 2HCl(aq) → MgCl2(aq) + H2¬O(l)
(Assume that the concentration of the HCl is great enough that it is in excess.)

Question

0.35 g of MgO(s) reacts completely with 50.0 g of HCl(aq). The temperature increases 6.24 C. Assuming the specific heat of the solution is 4.18 J/g∙oC, calculate ΔHrxn for:
MgO(s) + 2HCl(aq) → MgCl2(aq)  + H2¬O(l)
(Assume that the concentration of the HCl is great enough that it is in excess.)

anonymous · Answer

Please help! I can't figure this one out at all!