BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Solutions

Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Calculate ΔrH° for the reaction

2 C(s) + 3 H2(g) + ½ O2(g) → C2H5OH()

given the information below.

C(s) + O2(g) → CO2(g)

ΔrH° = −393.5 kJ/mol-rxn

2 H2(g) + O2(g) → 2 H2O()

ΔrH° = −571.6 kJ/mol-rxn

C2H5OH() + 3 O2(g) → 2 CO2(g) + 3 H2O()

ΔrH°= −1367.5 kJ/mol-rxn

Interpretation Introduction

Interpretation:

The enthalpy change of reaction has to be determined.

Concept Introduction:

The standard enthalpy of formation is the enthalpy change for the formation of 1mol of the compound directly from its component elements in their standard states.

Enthalpy change for the reaction ΔrH0=ΣnΔfH0(products)-ΣnΔfH0(reactants)

Explanation

Given equations are solved to get the required equation.

The 1st equation is multiplied by 2, we get,

  2C+2O22CO2                                             ΔrH0=-787kJ/mol

Dividing equation 2 by 2, and multiplying by 3 we get

  3H2+3/2O23H2O                                      ΔrH0=-857

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

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

One of the characteristics of a nutritious diet is that the diet provides no constituent in excess. This princi...

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

What characteristic do starts in a constellation or asterism share?

Horizons: Exploring the Universe (MindTap Course List)

What is genomics?

Human Heredity: Principles and Issues (MindTap Course List)

What is the most important chemical property of carboxylic acids?

Chemistry for Today: General, Organic, and Biochemistry

As in Example 27.2, consider a power supply with fixed emf and internal resistance r causing current in a load...

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