When a 56.06g sample of walnuts is burned with excess oxygen in a bomb calorimeter with a heat capacity of 23.25kJK-1. The temperature of the calorimeter rises fro 17.78C to 94.57C. What is the (Delta)U(rxn) value, in units kJ/g, for the combustion of this sample of walnuts? Include correct amount of significant figures.