   # Use standard enthalpies of formation in Appendix L to calculate enthalpy changes for the following: (a) 1.0 g of white phosphorus burns, forming P 4 O l0 (s) (b) 0.20 mol of NO(g) decomposes to N 2 (g) and O 2 (g) (c) 2.40 g of NaCl(s) is formed from Na(s) and excess Cl 2 (g) (d) 250 g of iron is oxidized with oxygen to Fe 2 O 3 (s) ### 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 57PS
Textbook Problem
3 views

## Use standard enthalpies of formation in Appendix L to calculate enthalpy changes for the following: (a) 1.0 g of white phosphorus burns, forming P4Ol0(s) (b) 0.20 mol of NO(g) decomposes to N2(g) and O2(g) (c) 2.40 g of NaCl(s) is formed from Na(s) and excess Cl2(g) (d) 250 g of iron is oxidized with oxygen to Fe2O3(s)

(a)

Interpretation Introduction

Interpretation:

The enthalpy change for the formation the following reaction 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 all those reactions-Hess’s law.

The change in enthalpy, ΔH in kJ per mole of a given reactant for the reaction can be calculated as:

ΔrH=enthalpy changenumber of moles

ΔrH=ΔHnumber of moles

### Explanation of Solution

Given mass is 1.0g

The enthalpy of formation is -2984kJ/mol

P4+5O2P4O10  ΔfH0=-2984kJ/mol

The change in enthalpy, ΔH in kJ per mole of a given reactant for the reaction can be calculated as:

<

(b)

Interpretation Introduction

Interpretation:

The enthalpy change for the formation the following reaction 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 all those reactions-Hess’s law.

(c)

Interpretation Introduction

Interpretation:

The enthalpy change for the formation the following reaction 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 all those reactions-Hess’s law

(d)

Interpretation Introduction

Interpretation:

The enthalpy change for the formation the following reaction 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 all 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
The number of calories to cut from the diet to produce weight loss should be based on a the amount of weight th...

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

Where are protons, electrons, and neutrons found in an atom?

Biology: The Dynamic Science (MindTap Course List)

In what way has biotechnology had an impact on agriculture in the United States?

Human Heredity: Principles and Issues (MindTap Course List)

Why can’t a white dwarf have a mass greater than 1.4 solar masses?

Horizons: Exploring the Universe (MindTap Course List)

What is the formula of the hydronium ion? a.H+ b.NH4+ c.H3O+ d.H2O+

Chemistry for Today: General, Organic, and Biochemistry

Figure P11.13 represents a small, flat puck with mass m = 2.40 kg sliding on a frictionless, horizontal surface...

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