Chapter 18, Problem 18.34QP

Interpretation Introduction

Interpretation:

To explain the importance of $\text{ATP}$ in biological system

Concept Introduction:

Free energy (Gibbs free energy) is the term that is used to explain the total energy content in a thermodynamic system that can be converted into work.  The free energy is represented by the letter G.  All spontaneous process is associated with the decrease of free energy in the system. There are many important reactions in the biological system in which the change in free energy is positive.  These non-spontaneous reactions require an external energy source for initiation.  $\text{ATP}$ is the molecule in which the energy for the cellular reaction is stored.