Heat of reaction is defined as the amount of heat absorbed or evolved at a given temperaturewhen the
Channel: Doubtnut
Date: 2020-03-29

Heat of reaction is defined as the amount of heat absorbed or evolved at a given temperaturewhen the reactants have combined to form the products is represented by a balanced chemcial equation. If the heat is denofed by q then the numerical value of q depends on the manner in which the reaction is performed for the two methods of conducting chemical reactions in calorimeters. Constant volume W = 0 and `q_(v) = Delta E` Bomb calorimeter Constant pressure W = - V `Delta`P, therefore `q_(P) = Delta E + P Delta V rar (V. Delta P)` When maltose `C_(12)H_(22)O_(11)(s)` burns in a calorimetric bomb at 298 K yielding carbon dioxide and water, the heat of combustion is -1350 kcal/mol, the heat of combustion of maltose at constant pressure will be