Last modified: Sun 10/06/2013 09:44:55 am
ACA

Oklahoma State University

It is OK to use your textbook or lecture notes from class, but if you can answers the questions without it that is OK too.

Do not press the RETURN or ENTER key while you are answering these questions. Your browser will interpret either the same as clicking on the Submit key.

Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.


First Name:

Last Name:

Laboratory Section:

 

1. A 1.00 liter container holds 1.00 mol of CO(g) and 1 .00 mol H2O(g) only at 800 °C. The reaction that occurs is described by the chemical equation

CO(g) + H2O(g) CO2(g) + H2(g)

a) Write the equilibrium expression for the reaction.

KC =

b) Which direction will the reaction proceed to reach equilibrium?

c) Assuming 'x' molar CO reacts to reach equilibrium, determine the entry for each substance in the change row in the ICE table below in terms of 'x', then determine the equilibrium entry for each substance.

 
CO(g)
+ H2O(g)
CO 2(g)

+ H2(g)

Initial Pressure

1.00 M

1.00 M

0 M

0 M

Change

M

M

M

M

Equilibrium Pressure

M

M

M

M

d) Substitute the equilibrium amounts into the equilibrium expression you enter in Q2.

KC =

e) The equilibrium constant for this reaction at this temperature is 0.72. Calculate the value of x, the amount of CO that reacts to reach equilibrium,

x = M

f) Determine the equilibrium concentration for each reactant and product in the reaction.

[CO] = M
[H2O] = M
[CO2] = M
[H2] = M

2. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

3. If there is one question you would like to have answered in lecture, what would that question be?