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 the entropy change, ΔrS°, for the vaporization of ethanol, C2H5OH, at its normal boiling point, 78.0 °C. The enthalpy of vaporization of ethanol is 39.3 kJ/mol.

Interpretation Introduction

Interpretation:

The ΔrS for a vaporization of ethanol should be calculated under given conditions.

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.

The value of ΔrG is zero at the boiling point of the liquid. Thus the entropy change can be written as,

ΔrS=ΔrHT

Explanation

The ΔrS for a vaporization of ethanol at its boiling point is calculated below.

The given reaction is,

C2H5OH(l)C2H5OH(g)

The boiling point is 78°C.

The enthalpy of vaporization of ethanol is 39.3 kJ/mol.

The expression for free energy change is,

ΔrG=ΔrHTΔrS

At the boiling point the value of ΔrG is zero

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

Chapter 18 Solutions

Show all chapter solutions add

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

People who choose not to eat meat or animal products need to find an alternative to the USDA Eating Patterns wh...

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

Unlike mass, weight is not a(n) ___ property. (1.4)

An Introduction to Physical Science

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

Horizons: Exploring the Universe (MindTap Course List)

Match the term listed in Column A with its definition from Column B

Nutrition Through the Life Cycle (MindTap Course List)

In intervals of interphase, G stands for ______. a. a gap b. growth c. Gey d. gene

Biology: The Unity and Diversity of Life (MindTap Course List)

During a solar eclipse, the Moon, the Earth, and the Sun all lie on the same line, with the Moon between the Ea...

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