CHEMISTRY:CENTRAL SCI.-W/ACCESS>CUSTOM<
15th Edition
ISBN: 9781323233252
Author: Brown
Publisher: PEARSON C
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Textbook Question
Chapter 14, Problem 26E
Use bond enthalpies in Table 5.4 Q to estimate 
for each of the following reactions:
a. H - H(g) + Br - Br(g) → 2H - Br(g)
b. (b) 
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Chapter 14 Solutions
CHEMISTRY:CENTRAL SCI.-W/ACCESS>CUSTOM<
Ch. 14.2 - Identify the force present and explain whether...Ch. 14.2 - Identify the force present and explain whether...Ch. 14.2 - Which of the following cannot leave or enter a...Ch. 14.2 - Prob. 14.2.2PECh. 14.2 - According to the first law of thermodynamics, what...Ch. 14.2 - Write an equation that expresses the first law of...Ch. 14.3 - Calculate AB and determine whether the process is...Ch. 14.3 - For the following processes, calculate the change...Ch. 14.3 - A gas is confined to a cylinder fitted with a...Ch. 14.3 - Consider a system consisting of two oppositely...
Ch. 14.3 - Prob. 14.6.1PECh. 14.3 - Indicate which of the following is independent of...Ch. 14.4 - During a normal breath, our lungs expand about...Ch. 14.4 - How much work (in J) is involved in a chemical...Ch. 14.4 - Why is the change in enthalpy usually easier to...Ch. 14.4 - Under what condition will the enthalpy change of a...Ch. 14.4 - Assume that the following reaction occurs at...Ch. 14.4 - Suppose that the gas-phase reaction 2NO(g) + 02(g)...Ch. 14.5 - Which of the following statements is or are true?...Ch. 14.5 - Prob. 14.10.2PECh. 14.5 - In the accompanying cylinder diagram, a chemical...Ch. 14.5 - Prob. 14.11.2PECh. 14.6 - Consider the two diagrams that follow. Based on...Ch. 14.6 - Consider the conversion of compound A into...Ch. 14.6 - What is the electrostatic potential energy (in...Ch. 14.6 - What is the electrostatic potential energy (in...Ch. 14.6 - Prob. 14.14.1PECh. 14.6 - Use the equations given in Problem 5.15 to...Ch. 14.6 - A sodium ion, Na+, with a charge of 1.6 x 10-19 C...Ch. 14.6 - A magnesium ion, Mg2+, with a charge of 3.2 x...Ch. 14 -
5.74 Using values from Appendix C, calculate the...Ch. 14 - Complete combustion of 1 mol of acetone (C2H6O)...Ch. 14 -
5.87 Consider the reaction 2H(g) + O2(g) ...Ch. 14 - The air bags that provide protection in...Ch. 14 -
5.111 From the following data for three...Ch. 14 -
5.123 Consider two solutions, the first being...Ch. 14 -
For each of the following transitions, give the...Ch. 14 - In this chapter, we have learned about the...Ch. 14 -
6.12 State where in the periodic table these...Ch. 14 - Einstein's 1905 paper on the photoelectric effect...Ch. 14 -
5.48 Consider the decomposition of liquid...Ch. 14 - Under constant-volume conditions, the heat of...Ch. 14 - Given the data use Hess's law to calculate H for...Ch. 14 -
5.67
What is meant by the term standard...Ch. 14 - S
5.68
What is the value of the standard enthalpy...Ch. 14 - For each of the following compounds, write a...Ch. 14 - Write balanced equations that describe the...Ch. 14 - The following is known as the thermite reaction:...Ch. 14 - (a) What are the units usually used to express the...Ch. 14 - Using values from Appendix C , calculate the...Ch. 14 -
5.77 Gasoline is composed primarily of...Ch. 14 - Prob. 21ECh. 14 - Ethanol (C2H5OH) is blended with gasoline as an...Ch. 14 -
5.80 Methanol (CH3OH) is used as a fuel in race...Ch. 14 -
5.81 Without doing any calculations, predict the...Ch. 14 -
5.82 Without doing any calculations, predict...Ch. 14 - Use bond enthalpies in Table 5.4 Q to estimate for...Ch. 14 - Use bond enthalpies in Table 5.40 to estimate for...Ch. 14 - Use enthalpies of formation given in Appendix C to...Ch. 14 -
5.86
The nitrogen atoms in an N2 molecule are...Ch. 14 -
5.89
What is meant by the term fuel value?
Which...Ch. 14 -
5.90
Which releases the most energy when...Ch. 14 -
5.91
A serving of a particular ready-to-serve...Ch. 14 -
5.92 A pound of plain M&M® candies contains 96 g...Ch. 14 -
5.93 The heat of combustion of fructose,...Ch. 14 -
5.94 The heat of combustion of ethanol,...Ch. 14 -
5.95 The standard enthalpies of formation of...Ch. 14 -
5.98 It is interesting to compare the ‘fuel...Ch. 14 - At the end of 2012, global population was about...Ch. 14 - Prob. 39ECh. 14 - (a) For a generic second-order reaction, what...Ch. 14 - A sample of gas is contained in a...Ch. 14 - Limestone stalactites and stalagmites are formed...Ch. 14 - Consider the systems shown in Figure 5.10. In one...Ch. 14 -
5.105 A house is designed to have passive solar...Ch. 14 -
5.108 A coffee-cup calorimeter of the type shown...Ch. 14 -
5.107
When a 0.235-9 sample of benzoic acid is...Ch. 14 -
5.108 Meals-ready-to-eat (MREs) are military...Ch. 14 - 5.109 Burning methane in oxygen can produce three...Ch. 14 - Prob. 49ECh. 14 - Ammonia (NH3) boils at -33 °C; at this temperature...Ch. 14 - Prob. 51ECh. 14 - Prob. 52ECh. 14 -
5.116 TheSun supplies about 1.0 kilowatt of...Ch. 14 -
5.117 Itis estimated that the net amount of...Ch. 14 -
5.118 At 20 °C (approximately room temperature)...Ch. 14 - Suppose an Olympic diver who weighs 52.0 kg...Ch. 14 -
5.120 Consider the combustion of a single...Ch. 14 -
5.121 Consider the following unbalanced...Ch. 14 - Consider the following acid-neutralization...Ch. 14 -
5.125 A sample of a hydrocarbon is combusted...Ch. 14 -
5.126 The methane molecule, CH4, has the geometry...Ch. 14 -
5.127 One of the best-selling light, or...Ch. 14 - A source of electromagnetic radiation produces...Ch. 14 - Which type of visible light has a longer...Ch. 14 - Consider the following three statements: For any...Ch. 14 - Prob. 66ECh. 14 - Prob. 67ECh. 14 -
A laser emits light that has a frequency of 4.69...Ch. 14 - Prob. 69ECh. 14 - Calculate the velocity of a neutron whose de...Ch. 14 - An orbital has n = 4 and ml = 0, 1, 2, 3 -3, - 2,...Ch. 14 -
What is the designation for the subshell with = 5...Ch. 14 - How many of the elements in the second row of the...Ch. 14 - Write the electron configuration for silicon,...Ch. 14 - A certain atom has an ns2np2electron configuration...Ch. 14 -
Which group of elements is characterized by an...Ch. 14 -
A certain atom has a [noble gas]5s24d105p4...Ch. 14 - Prob. 78ECh. 14 - Prob. 79ECh. 14 -
6.2 A popular kitchen appliance produces...Ch. 14 - 6.3 The following diagrams represent two...Ch. 14 -
6.4 Stars do not all have the same temperature....Ch. 14 - 6 5 The familiar phenomenon of a rainbow results...Ch. 14 -
6.7 A certain quantum mechanical system has the...Ch. 14 - Consider the three electronic transitions in a...Ch. 14 - Prob. 86ECh. 14 -
6.9 The contour representation of one of the...Ch. 14 -
6.10 The accompanying drawing shows a contour...Ch. 14 -
8.11 Four possible electron configurations for a...Ch. 14 -
6.14
a What is the relationship between the...Ch. 14 - Label each of the following statements as true or...Ch. 14 - Determine which of the following statements are...Ch. 14 - Arrange the following kinds of electromagnetic...Ch. 14 - List the following types of electromagnetic...Ch. 14 - What is the frequency of radiation that has a...Ch. 14 - What is the frequency of radiation whose...Ch. 14 - A laser pointer used in a lecture hall emits light...Ch. 14 - Prob. 98AECh. 14 - If human height were quantized in 1-foot...Ch. 14 - A gas is confined to a cylinder under constant...Ch. 14 - The complete combustion of ethanol, C2H5OH(l), to...Ch. 14 - The decomposition of Ca(OH)2(s) into CaO(s) and...Ch. 14 - Prob. 103AECh. 14 -
5.42 Without referring to tables, predict which...Ch. 14 - Consider the following reaction: 2 Mg(s) + 02(g)2...Ch. 14 -
544 Consider the following reaction:
2...Ch. 14 - When solutions containing silver ions and chloride...Ch. 14 - At one time, a common means of forming small...Ch. 14 - Prob. 109AECh. 14 - 5.49
a What are the units of molar heat...Ch. 14 - Two solid objects, A and B, are placed in boiling...Ch. 14 - What is the specific heat of liquid water? What is...Ch. 14 -
5.52
a. Which substance in Table 5.2 requires...Ch. 14 - The specific heat of octane, C8H18(l), is 2.22...Ch. 14 -
6.54 Consider the data about gold metal in...Ch. 14 - When a 6-50-g sample of solid sodium hydroxide...Ch. 14 -
5.56
a. When a 4 25-g sample of solid ammonium...Ch. 14 - A 2.200-g sample of quinone (C5H402) is burned in...Ch. 14 -
8.68 A 1.800-g sample of phenol (C6H5OH) was...Ch. 14 -
5.60 Under constant-volume conditions, the heat...Ch. 14 -
5.61 Can you use an approach similar to Hess's...Ch. 14 -
5.62 Consider the following hypothetical...Ch. 14 - Calculate the enthalpy change for the reaction...Ch. 14 - From the enthalpies of reaction calculate H for...Ch. 14 - From the enthalpies of reaction Calculate H for...
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- The thermochemical equation for the burning of methane, the main component of natural gas, is CH4(g)+2O2(g)CO2(g)+2H2O(l)H=890kJ (a) Is this reaction endothermic or exothermic? (b) What quantities of reactants and products are assumed if H = 890 kJ? (c) What is the enthalpy change when 1.00 g methane burns in an excess of oxygen?arrow_forward9.41 Under what conditions does the enthalpy change equal the heat of a process?arrow_forwardn Section 10.7, two characteristics of enthalpy changes for reactions are listed. What are these characteristics? Explain why these characteristics are true.arrow_forward
- 9.99 The chemical reaction BBr3(g)+BCl3(g)BBr2Cl(g)+BCl2Br(g) , has an enthalpy change very close to zero. Using Lewis structures of the molecules, all of which have a central boron atom, provide a molecular-level description of why H for this reaction might be very small.arrow_forwardIs the following reaction the appropriate one to use in determining the enthalpy of formation of methane, CH4(g)? Why or why not? C(g)+4H(g)CH4(g)arrow_forwardWith a platinum catalyst, ammonia will burn in oxygen to give nitric oxide, NO. 4NH3(g)+5O2(g)4NO(g)+6H2O(g);H=906kJ What is the enthalpy change for the following reaction? NO(g)+32H2O(g)NH3(g)+34O2(g)arrow_forward
- You discover that you cannot carry out a particular reaction for which you would like the enthalpy change. Does this mean that you will be unable to obtain this enthalpy change? Explain.arrow_forwardWhen 2.50 g of methane burns in oxygen, 125 kJ of heat is produced. What is the enthalpy of combustion per mole of methane under these conditions?arrow_forwardGive the definition of the standard enthalpy of formation for a substance. Write separate reactions for the formation of NaCl, H2O , C6H12O6, and PbSO4 that have H values equal to Hf for each compound.arrow_forward
- Would the amount of heat absorbed by the dissolution in Example 5.6 appear greater, lesser, or remain the same if the experimenter used a calorimeter that was a poorer insulator than a coffee cup calorimeter? Explain your answer.arrow_forwardHow much heat is produced by combustion of 125 g of methanol under standard state conditions?arrow_forwardGas A2 reacts with gas B2 to form gas AB at a constant temperature. The bond energy of AB is much greater than that of either reactant. What can be said about the sign of H? SSurr? S? Explain how potential energy changes for this process. Explain how random kinetic energy changes during the process.arrow_forward
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