C12h22o + 11 h2so4 → 12 c + 11 h2so4 + 11 h2o.
did the reactants give off energy when they formed the products?
yes

no

Yes

Explanation:

Chemical equation.

C₁₂H₂₂O₁₁  +  11H₂SO₄    →   12C + 11H₂SO₄ + 11H₂O

The sulfuric acid is used as a catalyst in the given reaction. Sucrose is break down into individual atoms carbon, hydrogen and oxygen.

Oxygen and hydrogen are combine to form water. The heat is released during the reaction and it is exothermic reaction. we can say that heat is given off because it is exothermic while in endothermic heat is taking by the substance.

Exothermic reaction:

The type of reactions in which energy is released are called exothermic reactions.

In this type of reaction energy needed to break the bonds are less than the energy released during the bond formation.

For example:

Chemical equation:

C + O₂   →  CO₂

ΔH = -393 Kj/mol

it can be written as,

C + O₂   →  CO₂ + 393 Kj/mol