   Chapter 5, Problem 87GQ

Chapter
Section
Textbook Problem

(a) Calculate the enthalpy change, ΔrH°, for the formation of 1.00 mol of strontium carbonate (the material that gives the red color in fire­works) from its elements. Sr(s) + C(s) + 3 2 , O2(g) → SrCO3(s)The experimental information available isSr(s) +½ O2(g) → SrO(s)       ΔfH° = –592 kJ/mol-rxnSrO(s) + CO2(g) → SrCO3(s)       ΔrH° = –234 kJ/mol-rxnC(graphite) + O2(g) → CO2(g)       ΔfH° = –394 kJ/mol-rxn (b) Draw an energy level diagram relating the energy quantities in this problem.

(a)

Interpretation Introduction

Interpretation:

The enthalpy change of formation of 1mol of SrCO3 has to be determined

Concept Introduction:

The standard enthalpy change of combustion of a compound is the enthalpy change which occurs when one gram of the compound is burned completely in oxygen under standard conditions, and with everything in its standard state.

ΔrH0=ΣnΔfH0(products)-ΣnΔfH0(reactants)

Explanation

Adding all the equations given, the required equation is observed. Therefore adding 3ΔfH0 of the corresponding equation we get,

Given formation constant are:

1.ΔrH0=-592kJ/mol2.ΔrH0=-234kJ/mol3

(b)

Interpretation Introduction

Interpretation:

The energy level diagram for the change of formation of 1mol of SrCO3 has to be depicted.

Concept Introduction:

The standard enthalpy change of combustion of a compound is the enthalpy change which occurs when one gram of the compound is burned completely in oxygen under standard conditions, and with everything in its standard state.

ΔrH0=ΣnΔfH0(products)-ΣnΔfH0(reactants)

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

Calculate your protein RDA.

Understanding Nutrition (MindTap Course List)

All the human senses have ___. (1.3)

An Introduction to Physical Science

What is hereditarianism, and what is the invalid assumption it makes?

Human Heredity: Principles and Issues (MindTap Course List)

Explain why organic compounds are nonconductors of electricity.

Chemistry for Today: General, Organic, and Biochemistry 