The combustion of fuel is (a)   reaction.

Heat liberated by a chemical reaction is assigned by (a)   .

Change in enthalpy of a system is due to the heat supplied at a constant (a)   .

The highly accurate values of enthalpy change of combustion can be measured by using a special apparatus called (a)   .

In an (a)   reaction, more energy will be stored in the products than in the reactants.

In an (a)   reaction, less energy will be stored in the products than in the reactants.

Chemical reaction provide (a)   which is the result of interaction between ions in an

electrolyte.

When chemical bonds are formed, heat is (a)   .

When chemical bonds are broken, heat is (a)   .