Fill the blank.

A process in which the system absorbs heat from its surroundings is called ______.

The combustion of fuel is ____ reaction.

Heat liberated by a chemical reaction is assigned by ______.

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

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

In an ______ reaction, more energy will be stored in the products than in the reactants.

In an ______ reaction, less energy will be stored in the products than in the reactants.

Chemical reaction provide ______ which is the result of interaction between ions in an

electrolyte.

When chemical bonds are formed, heat is ______.

When chemical bonds are broken, heat is ______.