# Hydrogenation, the addition of hydrogen to an organic compound, is an industrially important reaction. Calculate Δ r H °, Δ r S °, and Δ r G ° for the hydrogenation of octene, C 8 H 16 , to give octane, C 8 H 19 at 25 °C. Is the reaction product- or reactant-favored at equilibrium? C 8 H 16 (g) + H 2 (g) → C 8 H 18 (g) Along with data in Appendix L, the following information is needed for this calculation.

### Chemistry & Chemical Reactivity

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

Chapter
Section

### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 18, Problem 36GQ
Textbook Problem
76 views

## Hydrogenation, the addition of hydrogen to an organic compound, is an industrially important reaction. Calculate ΔrH°, ΔrS°, and ΔrG° for the hydrogenation of octene, C8H16, to give octane, C8H19 at 25 °C. Is the reaction product- or reactant-favored at equilibrium?C8H16(g) + H2(g) → C8H18(g)Along with data in Appendix L, the following information is needed for this calculation.

Interpretation Introduction

Interpretation:

The value of ΔrH°,ΔrS° and ΔrG for the hydrogenation of octene should be calculated.

Concept introduction:

The Gibbs free energy or the free energy change is a thermodynamic quantity represented by ΔrG. It is related to entropy and entropy by the following expression,

ΔrG=ΔrHTΔrS

Here, ΔrH is the change in enthalpy and ΔrS is the change in entropy.

### Explanation of Solution

The value of ΔrH°, ΔrS° and ΔrG for the hydrogenation of octane is calculated below.

Given:

C8H16(g)+H2(g)C8H18(g)ΔfH°(kJ/mol)82.930208.45S(J/Kmol)462.8+130.7463.639

ΔrH°=nΔfH°(products)nΔfH°(reactants)=[(1 mol C8H18(g)/mol-rxn)ΔfH°[C8H18(g)][(1 mol C8H16(g)/mol-rxn)ΔfH°[C8H16(g)]+(1 mol H2(g)/mol-rxn)ΔfH°[H2(g)]] ]

Substituting the values,

ΔrH°=[(1 mol C8H18(g)/mol-rxn)(208.45 kJ/mol)[(1 mol C8H16(g)/mol-rxn)(82.93 kJ/mol)+(1 mol H2(g)/mol-rxn)(0 kJ/mol)] ]=291

### 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
A slice of peach pie supplies 357 calories with 48 units of vitamin A; one large peach provides 42 calories and...

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

13. What is spectroscopy?

Chemistry In Focus

How are astronomers able to explore the layers of the Sun below the photosphere?

Horizons: Exploring the Universe (MindTap Course List)

Assign an IUPAC name to each of the following amines.

General, Organic, and Biological Chemistry

A glider of mass m is free to slide along a horizontal air track. It is pushed against a launcher at one end of...

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

Why were oceanographic conditions at Earths poles of interest to scientists?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin