   # Consider the combustion of propane: C 3 H 8 ( g ) + 5 O 2 ( g ) → 3 CO 2 ( g ) + 4 H 2 O ( l ) Δ H = − 2221 KJ Assume that all the heat in Example 7-3 comes from the combustion of propane. What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 60.% efficient? ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 7, Problem 47E
Textbook Problem
2786 views

## Consider the combustion of propane: C 3 H 8 ( g ) + 5 O 2 ( g ) → 3 CO 2 ( g ) + 4 H 2 O ( l )     Δ H = − 2221   KJ Assume that all the heat in Example 7-3 comes from the combustion of propane. What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 60.% efficient?

Interpretation Introduction

Interpretation: The mass of propane has to be calculated.

• Concept Introduction: constant-pressure calorimetry:

It is the measuring heat of a system via the temperature change at constant pressure.

The enthalpy change is equals to heat change under the same condition.

• H=qp......(1)H is enthalpy      q is heat at constant pressure.   Mass =Total energy× 1moleenthalpy change×molecular weightmole                                  ......(2)

### Explanation of Solution

Explanation

The enthalpy change, process efficiency and total efficiency are recorded as shown above.

To determine: The mass of propane for 60% efficiency process.

Total heat for the process = 1.3×108×100/60                                           = 2.2×108kJHeat for the 60% process  = 2

### 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
Before athletic competitions, a moderate caffeine intake may interfere with concentration. may enhance performa...

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

What is the definition of science?

An Introduction to Physical Science

Outline the three stages in the extraction of energy from food.

Chemistry for Today: General, Organic, and Biochemistry

Assume the resistive force acting on a speed skater is proportional to the square of the skaters speed v and is...

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

Estimate the inductance of a typical (metal) Slinky.

Physics for Scientists and Engineers: Foundations and Connections 