Chapter 18, Problem 18.15QP

Interpretation Introduction

Interpretation: The signs of $\Delta S_{\text{sys}}$ and $\Delta S_{\text{univ}}$ for the photosynthesis of glucose from carbon dioxide and water are to be stated.

Concept introduction: Entropy is a thermodynamic property which shows the randomness or disorder of the atoms within the system.

$\Delta S_{\text{sys}}$ is known as the entropy change for a system and $\Delta S_{\text{univ}}$ is entropy change in the universe.

The standard entropy of the reaction in the system is calculated by the formula,

$\Delta S_{\text{rxn}}^{°}={\displaystyle \sum n_{\text{products}}}{S}_{\text{products}}^{°}-{\displaystyle \sum n_{\text{reactants}}}{S}_{\text{reactants}}^{°}$

To determine: The signs of $\Delta S_{\text{sys}}$ and $\Delta S_{\text{univ}}$ for the photosynthesis of glucose from carbon dioxide and water.