Chemistry: An Atoms First Approach

2nd Edition

ISBN: 9781305079243

Author: Steven S. Zumdahl, Susan A. Zumdahl

Publisher: Cengage Learning

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Textbook Question

Chapter 7, Problem 15Q

The enthalpy change for the reaction

CH 4 ( g ) + 2 O 2 ( g ) → CO 2 ( g ) + 2 H 2 O ( l )

is − 891 kJ for the reaction as written.

a. What quantity of heat is released for each mole of water formed?

b. What quantity of heat is released for each mole of oxygen reacted?

Expert Solution & Answer

Chapter 7 Solutions

Chemistry: An Atoms First Approach

Ch. 7 - Define the following terms: potential energy,...Ch. 7 - Consider the following potential energy diagrams...Ch. 7 - What is the first law of thermodynamics? How can a...Ch. 7 - When a gas expands, what is the sign of w? Why?...Ch. 7 - Prob. 5RQ Ch. 7 - High-quality audio amplifiers generate large...Ch. 7 - Explain how calorimetry works to calculate H or E...Ch. 7 - What is Hesss law? When a reaction is reversed,...Ch. 7 - Define the standard enthalpy of formation. What...Ch. 7 - Prob. 1ALQ

Ch. 7 - Prob. 2ALQ Ch. 7 - A fire is started in a fireplace by striking a...Ch. 7 - Liquid water turns to ice. Is this process...Ch. 7 - Prob. 5ALQ Ch. 7 - Prob. 6ALQ Ch. 7 - Consider 5.5 L of a gas at a pressure of 3.0 atm...Ch. 7 - Explain why oceanfront areas generally have...Ch. 7 - Hesss law is really just another statement of the...Ch. 7 - Prob. 10ALQ Ch. 7 - Prob. 11Q Ch. 7 - Prob. 12Q Ch. 7 - Assuming gasoline is pure C8H18(l), predict the...Ch. 7 - Prob. 14Q Ch. 7 - The enthalpy change for the reaction...Ch. 7 - For the reaction HgO(s)Hg(l)+12O2(g),H=+90.7KJ: a....Ch. 7 - Prob. 17Q Ch. 7 - The enthalpy change for a reaction is a state...Ch. 7 - Standard enthalpies of formation are relative...Ch. 7 - The combustion of methane can be represented as...Ch. 7 - Prob. 21Q Ch. 7 - Prob. 22Q Ch. 7 - Prob. 23Q Ch. 7 - Prob. 24Q Ch. 7 - Prob. 25E Ch. 7 - Prob. 26E Ch. 7 - Consider the following diagram when answering the...Ch. 7 - Consider the accompanying diagram. 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J/g of energy when burned...Ch. 7 - Prob. 57E Ch. 7 - A 110.-g sample of copper (specific heat capacity...Ch. 7 - In a coffee-cup calorimeter, 50.0 mL of 0.100 M...Ch. 7 - In a coffee-cup calorimeter, 100.0 mL of 1.0 M...Ch. 7 - A coffee-cup calorimeter initially contains 125 g...Ch. 7 - In a coffee-cup calorimeter, 1.60 g NH4NO3 is...Ch. 7 - Consider the dissolution of CaCl2:...Ch. 7 - Consider the reaction...Ch. 7 - The heat capacity of a bomb calorimeter was...Ch. 7 - The combustion of 0.1584 g benzoic acid increases...Ch. 7 - The enthalpy of combustion of solid carbon to form...Ch. 7 - Combustion reactions involve reacting a substance...Ch. 7 - Given the following data calculate H for the...Ch. 7 - Given the following data...Ch. 7 - Prob. 71E Ch. 7 - Calculate H for the reaction...Ch. 7 - Given the following data...Ch. 7 - Given the following data...Ch. 7 - Give the definition of the standard enthalpy of...Ch. 7 - Write reactions for which the enthalpy change will...Ch. 7 - Prob. 77E Ch. 7 - Use the values of Hf in Appendix 4 to calculate H...Ch. 7 - The Ostwald process for the commercial production...Ch. 7 - Calculate H for each of the following reactions...Ch. 7 - The reusable booster rockets of the space shuttle...Ch. 7 - The space shuttle Orbiter utilizes the oxidation...Ch. 7 - Consider the reaction...Ch. 7 - The standard enthalpy of combustion of ethene gas,...Ch. 7 - Water gas is produced from the reaction of steam...Ch. 7 - Prob. 86E Ch. 7 - Prob. 87E Ch. 7 - Prob. 88E Ch. 7 - Some automobiles and buses have been equipped to...Ch. 7 - The complete combustion of acetylene, C2H2(g),...Ch. 7 - Prob. 91AE Ch. 7 - One way to lose weight is to exercise! 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The enthalpy change for the reaction CH 4 ( g ) + 2 O 2 ( g ) → CO 2 ( g ) + 2 H 2 O ( l ) is − 891 kJ for the reaction as written. a. What quantity of heat is released for each mole of water formed? b. What quantity of heat is released for each mole of oxygen reacted?

Solution Summary: The author explains the enthalpy change of a reaction defined as the quantity of heat that is absorbed or released at constant pressure.

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Chapter 7 Solutions