   # The enthalpy changes of the following reactions can be measured: C 2 H 4 (g) + 3 O 2 (g) → 2 CO 2 (g) + 2 H 2 O( ℓ ) Δ r H° = –1411.1 kJ/mol-rxn Q 2 H 5 OH( ℓ ) + 3 O 2 (g) → 2 CO 2 (g) + 3 H 2 O( ℓ ) Δ r H° = –1367.5 kJ/mol-rxn (a) Use these values and Hess’s law to determine the enthalpy change for the reaction C 2 H 4 (g) + H 2 O( ℓ ) → C 2 H 5 OH( ℓ ) (b) Draw an energy level diagram that shows the relationship between the energy quantities involved in this problem. ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 5, Problem 50PS
Textbook Problem
4 views

## The enthalpy changes of the following reactions can be measured:C2H4(g) + 3 O2(g) → 2 CO2(g) + 2 H2O(ℓ)ΔrH° = –1411.1 kJ/mol-rxnQ2H5OH(ℓ) + 3 O2(g) → 2 CO2(g) + 3 H2O(ℓ)ΔrH° = –1367.5 kJ/mol-rxn(a) Use these values and Hess’s law to determine the enthalpy change for the reactionC2H4(g) + H2O(ℓ) → C2H5OH(ℓ)(b) Draw an energy level diagram that shows the relationship between the energy quantities involved in this problem.

(a)

Interpretation Introduction

Interpretation:

The enthalpy change for the formation of C2H5OH has to be determined.

Concept Introduction:

If a reaction proceeds in two or more other reaction,ΔrH0 for the overall process is the sum of ΔrH0 values of those reactions-Hess’s law.

### Explanation of Solution

The required equation for the formation of C2H5OH is the reverse of 2rd

Equation i.e,

2CO2+3H2OC2H5OH+3O2

ΔrH20=1367.5kJ/mol

2nd equation should be subtracted from the 1nd equation

The net equation is C2H4+H2OC2H5OH

Therefore,

(b)

Interpretation Introduction

Interpretation:

The enthalpy change for the formation of C2H5OH has to be drawn.

Concept Introduction:

If a reaction proceeds in two or more other reaction,ΔrH0 for the overall process is the sum of ΔrH0 values of those reactions-Hess’s law.

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts
Fat breakdown without carbohydrate causes ketones to build up in the tissues and blood and be excreted in the u...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What are the strengths and weaknesses of vegetarian diets?

Understanding Nutrition (MindTap Course List)

What is RNA interference?

Biology (MindTap Course List)

List the differences between mitosis and meiosis in the following chart:

Human Heredity: Principles and Issues (MindTap Course List)

How can star clusters confirm astronomers’ theories of stellar evolution?

Horizons: Exploring the Universe (MindTap Course List)

Compare the half-life of plasma proteins with the half-life of enzymes.

Chemistry for Today: General, Organic, and Biochemistry

Two astronauts (Fig. P11.39), each having a mass of 75.0 kg, are connected by a 10.0-m rope of negligible mass....

Physics for Scientists and Engineers, Technology Update (No access codes included) 