Question

A 0.1219-g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter contains exactly 271 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg, in kJ/g and in kJ/mol.

Answer 1

q = [mass H2O x specific heat H2O x (delta T)] + (Ccal*delta T)

Answer 2

q = (271)(1)(1.126)+(1769)(1.126)
= 2297.04

q/.1219 = 18,843.64 J/g = 18.8436 kJ/g

this isnt right