Question

A 2.00g sample of octane (C8H18) (MM = 114.21 g/mol) is burned in a calorimeter that contains 1.20kg of water. The temperature of the water and the bomb rises from 25.00oC to 41.40oC. If the heat capacity of the bomb, Cbomb, is 837J/K calculate the heat given off per mole of octane. Specific heat for water: 4.184 J/g.°C

86 kJ/mol

41.2 kJ/mol

5.48 kJ/mol

5521.0 kJ/mol

4.21 kJ/mol