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Consider the reaction:CO(g) + 2H2(g) ? CH3OH(g)A reaction flask initially contains 112

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 122P Chapter 11

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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Problem 122P

PROBLEM 122P

Consider the reaction:

CO(g) + 2H2(g) → CH3OH(g)

A reaction flask initially contains 112 torr of CO and 282 torr of H2. The reaction is allowed to proceed until the pressure stops changing, at which point the total pressure is 196 torr. Determine the percent yield for the reaction. Assume a constant temperature and that no other reactions occur other than the one indicated.

Step-by-Step Solution:

Solution 122

Here, we are going to determine the percent yield for the given reaction.

Step 1:

The given reaction is:

                                CO(g) + 2H2(g) → CH3OH(g)

From the above equation, it is clear that 1 mole of CO requires 2 moles of H2 for complete reaction.

Now, at constant temperature and volume, the pressure(p) of a gas is directly proportional to the number of moles(n).

Thus,                        

                                p ∝ n

Now, if p1, n1 are the pressure and number of moles of a gas and p2, n2 are the volume and number of moles of another gas , then,

                                        p1 = kn1 

                                        p2 = kn2

Combining the two equations, we get, p1 / n1 = p2 / n2        -----(1)

Step 2 of 4

Chapter 11, Problem 122P is Solved
Step 3 of 4

Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

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Consider the reaction:CO(g) + 2H2(g) ? CH3OH(g)A reaction flask initially contains 112