Lecture 7-1 Equilibrium Constant.notebook · Lecture 71 Equilibrium Constant.notebook 1 July 25,...

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Lecture 71 Equilibrium Constant.notebook 1 July 25, 2012 Jan 110:03 PM 1 Chemical equilibrium may be used to describe A chemical reactions B acids and bases C solublility D A and C E A, B, and C Jan 110:06 PM 2 A chemical system in equilibrium will A have the same concentrations of all products and reactants B form more products if the temperature is increased C have a specific ratio of product to reactant concentrations D not have any precipitates E represent a spontaneous chemical process

Transcript of Lecture 7-1 Equilibrium Constant.notebook · Lecture 71 Equilibrium Constant.notebook 1 July 25,...

Page 1: Lecture 7-1 Equilibrium Constant.notebook · Lecture 71 Equilibrium Constant.notebook 1 July 25, 2012 Jan 110:03 PM 1Chemical equilibrium may be used to describe Achemical reactions

Lecture 7­1 Equilibrium Constant.notebook

1

July 25, 2012

Jan 1­10:03 PM

1 Chemical equilibrium may be used to describe

A chemical reactions

B acids and bases

C solublility

D A and C

E A, B, and C

Jan 1­10:06 PM

2 A chemical system in equilibrium will

A have the same concentrations of all products and reactants

B form more products if the temperature is increased

C have a specific ratio of product to reactant concentrations

D not have any precipitates

E represent a spontaneous chemical process

Page 2: Lecture 7-1 Equilibrium Constant.notebook · Lecture 71 Equilibrium Constant.notebook 1 July 25, 2012 Jan 110:03 PM 1Chemical equilibrium may be used to describe Achemical reactions

Lecture 7­1 Equilibrium Constant.notebook

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July 25, 2012

Jan 1­10:08 PM

3 Which is an appropriate formulation of the equilibrium law for the reaction

A  

B  

C  

D  

E  

MgCO3 (s)  +  2HCl (g) MgCl2(s)  +  CO2(g)  +  H2O(l)

Page 3: Lecture 7-1 Equilibrium Constant.notebook · Lecture 71 Equilibrium Constant.notebook 1 July 25, 2012 Jan 110:03 PM 1Chemical equilibrium may be used to describe Achemical reactions

Lecture 7­1 Equilibrium Constant.notebook

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July 25, 2012

Jan 1­10:18 PM

4 If units were used with the equilibrium constant, Kc, for the following reaction: 

CH4 (g)  +  3O2(g) CO2(g)  +  2H2O(g)

they would be

A M­2

B M2

C M

D M­1

E M3

Page 4: Lecture 7-1 Equilibrium Constant.notebook · Lecture 71 Equilibrium Constant.notebook 1 July 25, 2012 Jan 110:03 PM 1Chemical equilibrium may be used to describe Achemical reactions

Lecture 7­1 Equilibrium Constant.notebook

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July 25, 2012

Jan 1­10:23 PM

5 A reaction has a very large equilibrium constant of 3.3x1013.  Which statement is NOT true about this reaction?

A The reaction is very fast

B The reaction is essentially complete

C The reaction is spontaneous 

D The equilibrium constant will change if the temperature is changed

E The products will yield very little reactant

Jan 1­10:44 PM

6 The reaction 2NO2 (g)   N2O4 (g)  has an equilibrium constant of 4.5x103 at a certain temperature.  What is the equilibrium constant of 2N2O4 (g)  4NO2 (g)?

A 4.5x103

B 9.0x106

C 2.2x10­4

D 2.0x107

E 4.9x10­8