Chapter 19.3, Problem 19R

To determine

To classify: the chemical reaction photosynthesis as endothermic or exergonic.

To explain: the above phenomenon.

Explanation of Solution

Introduction:

In the chemical reaction the materials are converted to one or more separate compounds, the reactants. The substances are either compounds or chemical elements. In Balanced equations, coefficient in reactant and product are same in number.

Plants produce glucose and water by taking sunlight, carbon dioxide and water from atmosphere. This process is called photosynthesis.

The photosynthesis reaction is given below:

  ${\text{6CO}}_{\text{2}}{\text{+6H}}_{\text{2}}\text{O+sunlight}\to {\text{C}}_{\text{6}}{\text{H}}_{\text{12}}{\text{O}}_{\text{6}}{\text{+6O}}_{\text{2}}$

Endergonic reaction is such type of reactions in which more energy is required to break the bonds and to form products.

In photosynthesis reaction, energy is absorbed from the sunlight to break the bonds between carbon dioxide and water and to form glucose.

Thus, photosynthesis reaction is a kind of endogonic reaction.

Conclusion:

Hence, photosynthesis reaction is a kind of endogonic reaction.