Lecture 8 - 1 Today Finishing Ch 6 Starting Ch 7 The...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Today: Finishing Ch. 6, Starting Ch. 7
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 The Reaction Quotient For the generalized reaction: aA + bB gG +hH [ ] [ ] [] [] b init a init h init B A H G Q g init = If Q = K, reaction is already at equilibrium If Q < K, reaction proceeds to right to achieve equilibrium If Q > K, reaction proceeds to left to achieve equilibrium Given: K = 4.61 x 10 -3 for N 2 O 4 (g) 2NO 2 (g) at 25 o C Are these mixtures stable? If not, what are the equil. conc’ns? a) 0.0205 mol of NO 2 (g) and 0.750 mol N 2 O 4 . V = 5.25L No. Q = 1.07 x 10 -4 Q < K Reaction proceeds to right. At eq’m, [NO 2 ] = 0.0247 M, [N 2 O 4 ] = 0.133 M b) Same initial mixture, but V = 0.100L No. Q = 5.60 x 10 -3 Q > K Reaction proceeds to left.
Background image of page 2
Le Chatelier’s Principle When an equilibrium system is perturbed, the system responds by partially offsetting the perturbation. e.g. N 2 O 4 (g) 2 NO 2 (g) Δ H = 66.4 kJ Which way does equilibrium shift if: 1. Temperature is increased? 2N
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/16/2009 for the course CHEM 2150 taught by Professor Chirik,p during the Fall '08 term at Cornell.

Page1 / 11

Lecture 8 - 1 Today Finishing Ch 6 Starting Ch 7 The...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online