A student performed the first determination in Part 1. They reacted 58.37 g of 1 M HCl with 0.1949 g of magnesium. The temperature before mixing was 18.7C and the temperature after mixing was 33.9C. Calculate the Hfo of Mg2+(aq) based on this student's data. Report your final answer, in kJ/mol, to the nearest integer, and only include the numerical value (no units). Do not use scientific notation to answer this question.