Energy and reactions

Energy and reactions

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: olated system (page 32) Life is all about combating the inevitable increase in Entropy! Two factors determine the spontaneity of a reaction: • Enthalpy: ∆ H (or energy released or required) • Entropy: ∆ S (increase or decrease in order of system) • The spontaneity of a reaction is expressed as the Gibbs Free Energy or ∆ G (the energy available to do work) Does this reaction occur? Does Does it occur spontaneously? • Entropy (∆ S) : is it increasing? • Enthalpy (∆ H): is it giving off heat H): energy? energy? ∆ G = ∆ H - T∆ S ∆ G is Gibbs Free Energy Free Energy • Will the following reaction occur? C6H12O6 + 6O2 ---> 6CO2 + 6 H2O + energy ∆ G or Gibbs Free Energy is negative for this reaction - thus it will be spontaneous Gibbs Free Energy for a spontaneous reaction ∆G = ∆H - T ∆S Negative & exothermic Positive & More disordered STOP: explain this to a neighbor • See nex...
View Full Document

This document was uploaded on 03/26/2014 for the course BIOLOGY BIO101 at Tulane.

Ask a homework question - tutors are online