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Chemistry: An Atoms First Approach

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

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Chapter
Section
BuyFindarrow_forward

Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 7, Problem 77E
Textbook Problem
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Use the values of Δ H f ° in Appendix 4 to calculate ∆Hº for the following reactions.

a. Chapter 7, Problem 77E, Use the values ofHf in Appendix 4 to calculate H for the following reactions. a. b.

b. Ca 3 ( PO 4 ) ( s ) + 3 H 2 SO 4 ( l ) 3 CaSO 4 ( s ) + 2 H 3 PO 4 ( l )

c. NH 3 ( g ) + HCl ( g ) NH 4 Cl ( s )

a)

Interpretation Introduction

Interpretation: Standard enthalpy change has calculated for given reaction.

Concept introduction

Standard Enthalpy change (ΔH0): The heat change when molar quantities of reactants as specified by chemical equation to form a product at standard conditions. Standard condition: 250C and 1 atmosphere pressure.

Explanation of Solution

Given data

Standard state for given compound in the reaction are,

Substance and state          ΔHf0kJ / mole

NH3(g)                                   -46

O2(g)                                        0

CH4(g)                                   -75

HCN(g)                                 -135.1

H2O(g)                                -242

Ca(PO4)2(s)                           -4126H2SO4(l)                               -814

CaSO4(s)                              -1433

H3PO4(s)                              -1267

b)

Interpretation Introduction

Interpretation: Standard enthalpy change has calculated for given reaction.

Concept introduction

Standard Enthalpy change (ΔH0): The heat change when molar quantities of reactants as specified by chemical equation to form a product at standard conditions. Standard condition: 250C and 1 atmosphere pressure.

c)

Interpretation Introduction

Interpretation: Standard enthalpy change has calculated for given reaction.

Concept introduction

Standard Enthalpy change (ΔH0): The heat change when molar quantities of reactants as specified by chemical equation to form a product at standard conditions. Standard condition: 250C and 1 atmosphere pressure.

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Chapter 7 Solutions

Chemistry: An Atoms First Approach
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