Chemistry: The Central Science (13th Edition)
13th Edition
ISBN: 9780321910417
Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus
Publisher: PEARSON
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Textbook Question
Chapter 13, Problem 80E
Practice Exercise 1
When 0.243 g of Mg metal is combined with enough HCI to make 100 mL of solution in a constant-pressure calorimeter, the following reaction occurs:
Mg(s) + 2 HCl(aq)→MgCl2(aq)+H2(g)
If the temperature of the solution increases from 23.0 to 34.1 °C as a result of this reaction, calculate ΔH in kJ/mol Mg. Assume that the solution has a specific heat of 4-18 J/g-°C and a density of 1.00 g/mL.
- -19.1 kJ/mol
- -111 kJ/mol
- -191kJ/mol
- -464kJ/mol
- -961 kJ/mol
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Question 13 (Ch.7)
Zinc metal reacts with HCl according to the following balanced equation:
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
When 0.130 grams of Zn(s) is combined with an excess amount of HCl to make 48.0 mL of solution in a coffee-cup calorimeter, all the zinc reacts, raising the temperature of the solution from 21.70ºC to 24.00ºC. Find ΔH for this reaction in kJ/mol.
Assume the density of the solution is 1.01 g/mL and the specific heat capacity of the solution is 4.184 J/gºC.
Use an atomic weight of 65.38 g/mol for Zn
Hints:
-q(reaction) = q(solution)
ΔH = q/mol of limiting reagent
SIMPLE ALGORITHM: Correct significant figures and rounding off (Conventional).
6. Given the following reactions:
CaCO3(s) → CaO(s) + CO2(g) ΔH = 178.1 kJ
C(s, graphite) + O2(g) → CO2(g) ΔH = -393.5 kJ
Determine the enthalpy of the reaction of CaCO3(s) → CaO(s) + C(s, graphite) + O2(g).
Consider the following reaction, how many grams of aluminum can form when 823 kJ of heat is transferred?
Al2O3(s) → 2 Al(s) + 3/2 O2(g) ΔH = 1670 kJ
Question options:
a.
12.43
b.
51.67
c.
33.79
d.
26.59
Chapter 13 Solutions
Chemistry: The Central Science (13th Edition)
Ch. 13.3 - The labels have fallen off three bottles...Ch. 13.3 - Explain how a redox reaction involves electrons in...Ch. 13.3 - Prob. 13.2.1PECh. 13.3 - Prob. 13.2.2PECh. 13.4 -
4.11 Which data set, of the two graphed here,...Ch. 13.4 - You are titrating an acidic solution with a basic...Ch. 13.4 - State whether each of the following statements is...Ch. 13.4 - State whether each of the following statements is...Ch. 13.4 -
4.15 We have learned in this chapter that many...Ch. 13.4 - Prob. 13.5.2PE
Ch. 13.4 -
4.17 Specify what ions are present in solution...Ch. 13.4 - Prob. 13.6.2PECh. 13.5 - Prob. 13.7.1PECh. 13.5 - Acetone. CH3COCH3, is a nonelectrolyte;...Ch. 13.5 -
4.21 Using solubility guidelines, predict whether...Ch. 13.5 - Prob. 13.8.2PECh. 13.5 - Prob. 13.9.1PECh. 13.5 - Prob. 13.9.2PECh. 13.5 -
4 3 Use the molecular representations shown here...Ch. 13.5 - The concept of chemical equilibrium is very...Ch. 13.5 -
4 5 You are presented with a white solid and told...Ch. 13.5 - Which of the following ions will always be a...Ch. 13 - Which element is oxidized, and which is reduced in...Ch. 13 - Which of the following are redox reactions? For...Ch. 13 - Prob. 2ECh. 13 - Prob. 3ECh. 13 - Prob. 4ECh. 13 - Prob. 5ECh. 13 - The solubility of Xe in water at 1 atm pressure...Ch. 13 - The coinage metals (Group 1B) copper, silver, and...Ch. 13 - Prob. 8ECh. 13 - The contents of the closed box in each of the...Ch. 13 - An aqueous solution of an unknown solute is tested...Ch. 13 -
4.42 Because the oxide ion is basic, metal oxides...Ch. 13 - Prob. 12ECh. 13 -
4.44 As K20 dissolves in water, the oxide ion...Ch. 13 - True or false: If a substance is oxidized, it is...Ch. 13 - Prob. 15ECh. 13 - Which region of the periodic table shown here...Ch. 13 - Determine the oxidation number of sulfur in each...Ch. 13 - Determine the oxidation number for the indicated...Ch. 13 - Determine the oxidation number for the indicated...Ch. 13 - Write balanced molecular and net ionic equations...Ch. 13 - Using the activity series (Table 4.5), write...Ch. 13 - The enthalpy of solution of KBr in water is about...Ch. 13 - Prob. 23ECh. 13 -
4.58 The following reactions (note that the...Ch. 13 - Is the concentration of a solution an intensive or...Ch. 13 - Prob. 26ECh. 13 - Calculate the molarity of a solution that contains...Ch. 13 -
4.62
Calculate the molarity of a solution made by...Ch. 13 - Prob. 29ECh. 13 -
4.66 The average adult male has a total blood...Ch. 13 -
4.67
How many grams of ethanol, CH2CH2OH should...Ch. 13 - Prob. 32ECh. 13 - Which will have the highest concentration of...Ch. 13 - Prob. 34ECh. 13 - Prob. 35ECh. 13 - 13.36 Explain why pressure substantially affects...Ch. 13 - Prob. 37ECh. 13 - Prob. 38ECh. 13 - Prob. 39ECh. 13 - Prob. 40ECh. 13 - Prob. 41ECh. 13 - Prob. 42ECh. 13 - Prob. 43ECh. 13 - Prob. 44ECh. 13 - Some sulfuric acid is spilled on a lab bench You...Ch. 13 -
4.84 The distinctive odor of vinegar is due to...Ch. 13 - A 4.36-g sample of an unknown alkali metal...Ch. 13 -
4.86 An 8.65-g sample of an unknown group 2A...Ch. 13 - A solution of 100.0 mL of 0.200 M KOH is mixed...Ch. 13 - A 1.248-9 sample of limestone rock is pulverized...Ch. 13 - 4.91 Uranium hexafluoride, UF6, is processed to...Ch. 13 - The accompanying photo shows the reaction between...Ch. 13 - Prob. 53ECh. 13 -
4.94 You choose to investigate some of the...Ch. 13 -
4 95 Antacids are often used to relieve pain and...Ch. 13 -
4 96 The commercial production of nitric acid...Ch. 13 - Consider the following reagents: zinc, copper,...Ch. 13 - 98 Bronze is a solid solution of Cu(s) and Sn(s);...Ch. 13 - Prob. 59ECh. 13 - Tartaric acid. H2C4H4O6, has two acidic hydrogens....Ch. 13 - Prob. 61ECh. 13 - A solid sample of Zn(OH)2 is added to 0.350 L of...Ch. 13 - Prob. 63ECh. 13 - Prob. 64ECh. 13 - Prob. 65ECh. 13 - A fertilizer railroad car carrying 34,300 gallons...Ch. 13 - Prob. 67ECh. 13 - Prob. 68ECh. 13 - Prob. 69ECh. 13 - Prob. 70ECh. 13 -
4.115 Federal regulations set an upper limit of...Ch. 13 - A mixture of gases A2 and B2 are introduced to a...Ch. 13 - Practice Exercise 2 Calculate the change in the...Ch. 13 - A solid sample of Zn(OH)2 is added to 0.350 L of...Ch. 13 -
Practice Exercise 2
Calculate the work, in J, if...Ch. 13 - Practice Exercise 1 A chemical reaction that gives...Ch. 13 - Prob. 77ECh. 13 - Prob. 78ECh. 13 - Prob. 79ECh. 13 - Practice Exercise 1 When 0.243 g of Mg metal is...Ch. 13 - Practical exercise 2 When 50.0 mL of 0.100MAgNO3...Ch. 13 - Prob. 82ECh. 13 - Prob. 83ECh. 13 - Prob. 84ECh. 13 - Prob. 85ECh. 13 - Calculate H for the reaction C(s)+...Ch. 13 - Prob. 87ECh. 13 - Prob. 88ECh. 13 - Prob. 89ECh. 13 - Prob. 90ECh. 13 - Prob. 91AECh. 13 - Prob. 92AECh. 13 -
Use the average bond enthalpies in Table 5.4 to...Ch. 13 - Prob. 94AECh. 13 - Prob. 95AECh. 13 - One of the important ideas of thermodynamics is...Ch. 13 - Two positively charged spheres, each with a charge...Ch. 13 - SI The accompanying photo shows a pipevine...Ch. 13 - Consider the accompanying energy diagram. Does...Ch. 13 - Write balanced net ionic equations for the...Ch. 13 -
4.27 Separate samples of a solution of an unknown...Ch. 13 - Prob. 102AECh. 13 - Prob. 103AECh. 13 - Prob. 104AECh. 13 - Prob. 105AECh. 13 - Prob. 106IECh. 13 - State whether each of the following statements is...Ch. 13 - State whether each of the following statements is...Ch. 13 - A textbook on chemical thermodynamics states, “The...Ch. 13 - Prob. 110IECh. 13 - Prob. 111IECh. 13 - Complete and balance the following molecular...Ch. 13 -
[13.113]At 35°C the vapor pressure of acetone,...Ch. 13 - Write balanced molecular and net ionic equations...
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