LECTURE11 - Last Time aA + bB cC + dD Kc = [C]c[D]d...

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

View Full Document Right Arrow Icon
1 aA + bB cC + dD K c = [A] a [B] b [C] c [D] d Last Time Hess-like Law K c (AB) = = = K c (AC) · K c (CD) · K c (DB) [C] c [A] a [D] d [C] c [D] d [B] b aA cC bB dD K c (AC) K c (DB) K c (CD) ? a A c C c C d D d D b B + + Add the reactions multiply the K’s [A] a [B] b a A b B
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 N 2 (g) + ½O 2 (g) N 2 O(g) K c(1) = 2.7 10 -18 N 2 (g) + O 2 (g) 2 NO(g) K c(2) = 4.7 10 -31 [N 2 ][O 2 ] [NO] 2 = [N 2 ][O 2 ] ½ [N 2 O] = N 2 O(g) + ½O 2 (g) 2 NO(g) K c = ? E.g. 1. 2. N 2 O(g) N 2 (g) + ½O 2 (g) K c = = 1/ K c(1) = 3.7 10 17 N 2 (g) + O 2 (g) 2 NO(g) K c = K c(2) = 4.7 10 -31 [N 2 ][O 2 ] [NO] 2 = [N 2 ][O 2 ] ½ [N 2 O] N 2 O(g) + ½O 2 (g) 2 NO(g) + K c = 3.7 10 17 4.7 10 -31 = 1.7 10 -13 The Equilibrium Constant, K P •U s e K P , based upon partial pressures of gases. aA(g) bB(g) K c = [B] b [A] a (n B /V) b (n A /V) a P B b P A a (RT) a–b = (RT) a–b K p = = aA(g) + bB(g) cC(g) + dD(g) K c = [A] a [B] b [C] c [D] d P C c P D d P A a P B b (RT) n gas = (RT) n gas K p = Or, K P = K c ( RT ) Δ n gas (P B /RT) b (P A /RT) a =
Background image of page 2
3 Given that K c for the formation of NO(g) is 4.7 10 -31 at 298 K and that the equilibrium partial pressures of N 2 and O 2
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 07/09/2011 for the course CHE 2B 2B taught by Professor Tobyallen during the Spring '11 term at UC Davis.

Page1 / 8

LECTURE11 - Last Time aA + bB cC + dD Kc = [C]c[D]d...

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