Chemical Principles
8th Edition
ISBN: 9781305581982
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 9, Problem 10DQ
Interpretation Introduction
Interpretation: The reason for negative sign in equation,
Concept Introduction:Work is calculated using equation:
Where
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Students have asked these similar questions
The Haber-Bosch process permits the direct conversion of molecular nitrogen to ammonia,
which can be used in large-scale fertilizer production. Given the balanced Haber-Bosch
reaction and using the bond energies in the table below, estimate the enthalpy change
associated with the reaction.
N2(g) + 3H2(g) → 2NH3(g)
Bond
N=N
N = N
Energy (kJ/mol)
941
418
N-N
H-H
N-H
163
435
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Benzoic acid is used to determine the heat capacity of bomb calorimeters because it can be obtained in pure form and its energy of combustion is known very accurately (−26.43 kJ/g). Determine the heat capacity of a calorimeter that had a temperature increase of 9.199°C when 3.500 g of benzoic acid was used.
Given the standard enthalpies of formation for the following substances, determine the
reaction enthalpy for the following reaction.
2N2H4(g) + 2NO2(g) → 3N2(g) + 4H2O(g)
AHrxn
? kJ
Substance
AH in kJ/mol
N2H4(g)
+95.4
NO2(g)
+33.1
H2O(g)
-241.8
Chapter 9 Solutions
Chemical Principles
Ch. 9 - Objects placed together eventually reach the same...Ch. 9 - What is meant by the term lower in energy? Which...Ch. 9 - A fire is started in a fireplace by striking a...Ch. 9 - Liquid water turns to ice. Is this process...Ch. 9 - Consider the following statements: “Heat is a form...Ch. 9 - Prob. 6DQCh. 9 - Explain why oceanfront areas generally have...Ch. 9 - Predict the signs of q and w for the process of...Ch. 9 - Hess’s law is really just another statement of the...Ch. 9 - Prob. 10DQ
Ch. 9 - Prob. 11DQCh. 9 - Prob. 12DQCh. 9 - Prob. 13DQCh. 9 - Prob. 14DQCh. 9 - Prob. 15ECh. 9 - Consider the following potential energy diagrams...Ch. 9 - Consider an airplane trip from Chicago, Illinois,...Ch. 9 - Consider the following diagram when answering the...Ch. 9 - Assuming gasoline is pure C8H18(l) , predict the...Ch. 9 - Prob. 20ECh. 9 - Prob. 21ECh. 9 - A piston performs work of 210.Latm on the...Ch. 9 - A system undergoes a process consisting of the...Ch. 9 - Calculate the internal energy change for each of...Ch. 9 - Prob. 25ECh. 9 - Prob. 26ECh. 9 - One mole of H2O(g) at 1.00atm and 100.C occupies a...Ch. 9 - Prob. 28ECh. 9 - Prob. 29ECh. 9 - Prob. 30ECh. 9 - Prob. 31ECh. 9 - Are the following processes exothermic or...Ch. 9 - Prob. 33ECh. 9 - Prob. 34ECh. 9 - Prob. 35ECh. 9 - Prob. 36ECh. 9 - Prob. 37ECh. 9 - For the following reactions at constant pressure,...Ch. 9 - Calculate the energy required to heat 1.00kg of...Ch. 9 - Calculate q , w , E , and H for the process in...Ch. 9 - Consider 111J of heat added to 30.3g of Ne on STP...Ch. 9 - Consider a sample containing 2.00moles of a...Ch. 9 - Prob. 43ECh. 9 - The specific heat capacity of silver is...Ch. 9 - Consider the substances in Table9.3 . Which...Ch. 9 - A 150.0-g sample of a metal at 75.0C is added to...Ch. 9 - Prob. 47ECh. 9 - Prob. 48ECh. 9 - Prob. 49ECh. 9 - Prob. 50ECh. 9 - In a coffee cup calorimeter, 50.0mL of 0.100MAgNO3...Ch. 9 - In a coffee cup calorimeter, 100.0mL of 1.0MNaOH...Ch. 9 - A coffee cup calorimeter initially contains 125g...Ch. 9 - In a coffee cup calorimeter, 1.60g of NH4NO3 is...Ch. 9 - Prob. 55ECh. 9 - Consider the reaction...Ch. 9 - The heat capacity of a bomb calorimeter was...Ch. 9 - The combustion of 0.1584g benzoic acid increases...Ch. 9 - Prob. 59ECh. 9 - Calculate w and E when 1mole of a liquid is...Ch. 9 - Prob. 61ECh. 9 - Calculate H for the reaction...Ch. 9 - Given the following data:...Ch. 9 - Given the following data:...Ch. 9 - Prob. 65ECh. 9 - Given the following data:...Ch. 9 - Combustion reactions involve reacting a substance...Ch. 9 - Given the following data: 2O3(g)3O2(g)H=427kJ...Ch. 9 - Prob. 69ECh. 9 - Prob. 70ECh. 9 - Prob. 71ECh. 9 - The combustion of methane can be represented as...Ch. 9 - Prob. 73ECh. 9 - Prob. 74ECh. 9 - Calculate H for each of the following reactions...Ch. 9 - The reusable booster rockets of the space shuttle...Ch. 9 - Prob. 77ECh. 9 - Prob. 78ECh. 9 - At 298K , the standard enthalpies of formation for...Ch. 9 - Prob. 80ECh. 9 - Prob. 81ECh. 9 - The standard enthalpy of combustion of ethene gas...Ch. 9 - Prob. 83ECh. 9 - Prob. 84ECh. 9 - Prob. 85ECh. 9 - Assume that 4.19106kJ of energy is needed to heat...Ch. 9 - Prob. 87ECh. 9 - Prob. 88ECh. 9 - Prob. 89ECh. 9 - Some automobiles and buses have been equipped to...Ch. 9 - Consider the following cyclic process carried out...Ch. 9 - Determine E for the process H2O(l)H2O(g) at 25C...Ch. 9 - The standard enthalpy of formation of H2O(l) at...Ch. 9 - Prob. 94AECh. 9 - Prob. 95AECh. 9 - Prob. 96AECh. 9 - Prob. 97AECh. 9 - Prob. 98AECh. 9 - Prob. 99AECh. 9 - Prob. 100AECh. 9 - Prob. 101AECh. 9 - Prob. 102AECh. 9 - Prob. 103AECh. 9 - Prob. 104AECh. 9 - Prob. 105AECh. 9 - High-quality audio amplifiers generate large...Ch. 9 - Prob. 107AECh. 9 - Prob. 108AECh. 9 - Prob. 109AECh. 9 - Prob. 110AECh. 9 - Prob. 111AECh. 9 - Prob. 112AECh. 9 - Prob. 113AECh. 9 - Prob. 114AECh. 9 - Prob. 115AECh. 9 - The heat required to raise the temperature from...Ch. 9 - Prob. 117CPCh. 9 - Prob. 118CPCh. 9 - The heat of vaporization of water at the normal...Ch. 9 - Consider the following reaction at 248C and...Ch. 9 - Prob. 121CPCh. 9 - Prob. 122CPCh. 9 - Prob. 123CPCh. 9 - You have a 1.00-mole sample of water at -30.C ,...Ch. 9 - Prob. 125MPCh. 9 - A gaseous hydrocarbon reacts completely with...
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