CHM112 Home Page Reference Materials Homework Assignments Lectures Exams & Quizzes Grades Study Aids URI Home Page

J. W. Hill, R. H. Petrucci, T. W. McCreary, & S. S. Perry General Chemistry 4th edition

Review Question 17.16

How does the equilibrium constant Keq resemble, and how does it differ from, Kc and Kp?


The thermodynamic equilibrium constant Keq is formally written in terms of activities, a unitless quantity. Activities are approximated by using solution concentrations in units of molarity (divided by 1 M to remove the units) and gas partial pressures in units of atm (divided by 1 atm to remove the units). Kc is written solely in terms of molarity and Kp is written solely in terms of partial pressures. Keq can mix "units".