Bomb Calorimeter

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) The heat capacity of a bomb calorimeter is 300 JK When 0.16 gm of methane was burnt in this calorimeter the temperature rose by 3^(@) C. The value of Delta U per mole will be

Heat of combustion of benzoic acid (C_(6)H_(5)COOH) at constant volume at 25^(@)C is -3233 kJ/mole. When 0.5 g of benzoic acid is burnt in bomb calorimeter, the temperature of calorimeter increased by 0.53^(@)C . Now in the same bomb calorimeter 1g of C_(2)H_(6) burnt then temperature increased by 2.04 C . DeltaH for combustion of C_(2)H_(6) is

A 1.250 g sample of octane (C_(8)H_(18)) is burned in excess of oxygen in a bomb calorimeter. The temperature of calorimeter rises from 294.05 K to 300.78 K . If heat capacity of the calorimeter is 8.93 kJ K^(-1) , find the heat transferred to calorimeter.

When 1.0 gm of fructose C_(6) H_(12) O_(6) (s) is burnt in oxygen in a bomb calorimeter, the temperature of the calorimeter water increases by 1.56^(@)C . If the heat capacity of the calorimeter and its contents is 10.0 kJ//^(@)C . Calculate the enthalpy of combustion of fructose at 298 K.

0.16 g of methane was subjected to combustion at 27^(@) C in a bomb calorimeter. The temperature of calorimeter system (including water) was found to rise by 0.5^(@) C. Calculate the heat of combustion of methane at (i) constant volume and (ii) constant pressure. The thermal capacity of the calorimeter system is 17.7 kJ K^(-1) .

The heat liberated when 1.89 g of benzoic acid is burnt in a bomb calorimeter at 25^(@)C increases the temperture of 18.94 kg of water by 0.632 ^(@)C . If the specific heat of water at 25^(@)C is 0.998 cal//g "deg" , the value of the heat of combustion of benzoic acid is