General Chemistry: Principles and Modern Applications (11th Edition)
11th Edition
ISBN: 9780132931281
Author: Ralph H. Petrucci, F. Geoffrey Herring, Jeffry D. Madura, Carey Bissonnette
Publisher: PEARSON
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Chapter 7, Problem 82E
Interpretation Introduction
Interpretation:
The possible relationships between the molecular structure of the hydrocarbons and their standard enthalpies of formation needs to be established.
Concept introduction:
Standard enthalpy of the formation is defined as the change of enthalpy when 1 mol of a substance is formed from reaction of its constituent elements.
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Chapter 7 Solutions
General Chemistry: Principles and Modern Applications (11th Edition)
Ch. 7 - Calculate the quantity of heat, in kilojoules, (a)...Ch. 7 - Calculate the final temperature that results when...Ch. 7 - Refer to Example 7-2. The experiment is repeated...Ch. 7 - A 75.0 g piece of Ag metal is heated to 80.0C and...Ch. 7 - A 465 g chunk of iron is removed from an oven and...Ch. 7 - A piece of stainless steel (C2=0.50Jg-1C-1) is...Ch. 7 - A 1.00 kg sample of magnesium at 40.0C is added to...Ch. 7 - Brass has a density of 8.40 g/cm2 and a specific...Ch. 7 - A 74.8 g sample of copper at 143.2C is added to an...Ch. 7 - A 69.0 g sample of gold at 127.1C is added to an...
Ch. 7 - In the form of heat, 6052 J of energy is...Ch. 7 - What is the final temperature (in C) of 1.24 g of...Ch. 7 - How much heat, in kilojoules, is associated with...Ch. 7 - The standard enthalpy of reaction for the...Ch. 7 - How much heat, in kilojoules, is evolved the...Ch. 7 - Upon complete combustion the indicated substances...Ch. 7 - The combustion of methane gas, the principal...Ch. 7 - Refer to the Integrative Example. What volume of...Ch. 7 - The combustion of hydrogen-oxygen mixtures is used...Ch. 7 - Thermite mixtures are used for certain types of...Ch. 7 - A 0.205 g pellet of potassium hydroxide, KOH, is...Ch. 7 - The heat of solution of Kl(s) in water is...Ch. 7 - You are planning lecture demonstration to...Ch. 7 - Care must be taken in preparing solutions of...Ch. 7 - Refer to Example 7-4. The product of the...Ch. 7 - Prob. 26ECh. 7 - Prob. 27ECh. 7 - Prob. 28ECh. 7 - What mass of ice can be meted the same quantity of...Ch. 7 - What will be the final temperature of the water in...Ch. 7 - A 125 g stainless steel ball bearings...Ch. 7 - Prob. 32ECh. 7 - The enthalpy of sublimation (solid gas) for dry...Ch. 7 - The enthalpy of vaporization forN2 (I)is 5.56...Ch. 7 - A sample gives off 5228 cal when burned in a bomb...Ch. 7 - The following substances undergo complete...Ch. 7 - A bomb calorimetry experiment is performed...Ch. 7 - A coffee-cup calorimeter contains 100.0 mL of...Ch. 7 - A 0.75 g sample of KCI is added to 350 g H2O in a...Ch. 7 - The heat of solution of potassium acetate in water...Ch. 7 - Prob. 41ECh. 7 - Salicylic acid, C7H5O2 , has been suggested as a...Ch. 7 - Refer to Example 7-3. Based on the heat of...Ch. 7 - A 1.397 g sample of thymol, C10H14O(s) (a...Ch. 7 - A g of NaCI is added to a Styrofoam cup of water,...Ch. 7 - can determine purity of solid materials by using...Ch. 7 - Calculate the quantity of work associated with a...Ch. 7 - Calculate the quantity of work, in joules,...Ch. 7 - A 1.00 g sample of Ne(g) at 1 atm pressure and 27C...Ch. 7 - Compressed air in aerosol cans is used to free...Ch. 7 - In each of the following processes, is any work...Ch. 7 - In each of the following processes, any work done...Ch. 7 - If 325 J of work is done by a system at a pressure...Ch. 7 - A movable piston a cylinder holding 5.0 L N2(g) is...Ch. 7 - What is the change in internal energy of a system...Ch. 7 - Whet the change in internal energy of e system if...Ch. 7 - The internal energy of a fixed quantity of an...Ch. 7 - Prob. 58ECh. 7 - Prob. 59ECh. 7 - Prob. 60ECh. 7 - There are other forms of work besides PV work. For...Ch. 7 - Another form of work is extension, defined as the...Ch. 7 - Only one of the following quantities is equal to...Ch. 7 - Determine whether H is equal to, greater than, or...Ch. 7 - The heat of combustion of propan-2-ol at 298.15 K,...Ch. 7 - Prob. 66ECh. 7 - The standard enthalpy of formation of NH2(g) is...Ch. 7 - Use Hess's law to determine rH for the reaction...Ch. 7 - Use Hess's law to determine rH for the reaction 2...Ch. 7 - Given the following information:...Ch. 7 - For the reaction C2H4(g)+CIz(g)C2H4CI2(I) ,...Ch. 7 - Determine rH for this reaction from the data...Ch. 7 - Substitute natural gas (SNG) is a gaseous mature...Ch. 7 - CCI4 , an important commercial solvent, is...Ch. 7 - Use Hess's law and the following data...Ch. 7 - The standard heats of combustion (rH) of butane-l...Ch. 7 - One glucose molecule, C6H12O6(s) is converted to...Ch. 7 - The standard of fermentation of glucose to ethanol...Ch. 7 - Use standard enthalpies of formation from Table...Ch. 7 - Use standard enthalpies of formation from Tables...Ch. 7 - Use the information given here. date from Appendix...Ch. 7 - Prob. 82ECh. 7 - Prob. 83ECh. 7 - Use data from Appendix D to calculate rH for the...Ch. 7 - Prob. 85ECh. 7 - Use data from Table 7.2, together with the...Ch. 7 - Use data from Table 7.2 and rH for re following...Ch. 7 - Use data from Table 7.2 and rH for the following...Ch. 7 - Prob. 89ECh. 7 - Prob. 90ECh. 7 - The decomposition of limestone, CaCO2(s) into...Ch. 7 - Use data from Table 7.2 to calculate the volume of...Ch. 7 - Ants release formic acid (HCOOH) when they bite....Ch. 7 - Prob. 94ECh. 7 - A British thermal unit (Btu) is defined as the...Ch. 7 - What volume of 18.5C water must be added, together...Ch. 7 - A 7.26 kg shot (as used the sporting event, the...Ch. 7 - An alternative approach to bomb calorimetry is to...Ch. 7 - Prob. 99IAECh. 7 - Prob. 100IAECh. 7 - Determine the missing values of rH in the diagram...Ch. 7 - A particular natural gas consists, in mole...Ch. 7 - Prob. 103IAECh. 7 - Prob. 104IAECh. 7 - A calorimeter that measures an exothermic heat of...Ch. 7 - For the reaction C2H4(g)+3O2(g)2CO2(g)+2H2O(I)...Ch. 7 - Some of the butane, C4H10(g) , in a 200.0 L...Ch. 7 - The metabolism of glucose, C5H12O5 yields CO2(g)...Ch. 7 - Prob. 109IAECh. 7 - Upon complete combustion, a 1.00 L sample (at STP)...Ch. 7 - Prob. 111IAECh. 7 - Refer to the discussion of the gasification of...Ch. 7 - A 1.103 g sample of a gaseous...Ch. 7 - Several factors are involved in determining the...Ch. 7 - Prob. 115IAECh. 7 - Prob. 116IAECh. 7 - Prob. 117IAECh. 7 - In the Are You Wondering 7-1 box, the temperature...Ch. 7 - Prob. 119IAECh. 7 - Prob. 120IAECh. 7 - Cetane, C15H34, is a typical petrodiesel with a...Ch. 7 - Carbon dioxide emissions have been implicated as a...Ch. 7 - Prob. 123FPCh. 7 - Prob. 124FPCh. 7 - We can use the heat liberated by a neutralization...Ch. 7 - In a student experiment to confirm Hess's law, the...Ch. 7 - Prob. 127FPCh. 7 - Refer to Example 7-5 dealing with the work done by...Ch. 7 - Look up the specific heat capacity of several...Ch. 7 - In your own words, define or explain the following...Ch. 7 - Prob. 131SAECh. 7 - Explain the important distinctions between each...Ch. 7 - The temperature increase of 225 mL of water at 25C...Ch. 7 - A plausible final temperature when 75.0 ml of...Ch. 7 - U= 100 J for a system that gives off 100 J of heat...Ch. 7 - Prob. 136SAECh. 7 - The standard molar enthalpy of formation of CO2(g)...Ch. 7 - Write the formation reaction for each of the...Ch. 7 - Compute rH for the following reactions. The value...Ch. 7 - When dissolved in water, 1.00 mol LiCI produces...Ch. 7 - Prob. 141SAECh. 7 - Prob. 142SAECh. 7 - Prob. 143SAECh. 7 - A 1.22 kg piece of iron at 126.5C is dropped into...Ch. 7 - Prob. 145SAECh. 7 - The standard molar heats of combustion of...Ch. 7 - Prob. 147SAECh. 7 - Prob. 148SAECh. 7 - Prob. 149SAECh. 7 - Prob. 150SAECh. 7 - Prob. 151SAECh. 7 - Prob. 152SAECh. 7 - Prob. 153SAECh. 7 - Prob. 154SAE
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- Would the amount of heat absorbed by the dissolution in Example 5.6 appear greater, lesser, or remain the same if the heat capacity of the calorimeter were taken into account? Explain your answer.arrow_forward9.41 Under what conditions does the enthalpy change equal the heat of a process?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_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_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_forwardThe enthalpy change for the following reaction is 393.5 kJ. C(s,graphite)+O2(g)CO2(g) (a) Is energy released from or absorbed by the system in this reaction? (b) What quantities of reactants and products are assumed? (c) Predict the enthalpy change observed when 3.00 g carbon burns in an excess of oxygen.arrow_forward
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- Which of the enthalpies of combustion in Table 5.2 the table are also standard enthalpies of formation?arrow_forwardThe following reactions can be used to prepare samples of metals. Determine the enthalpy change under standard state conditions for each. (a) 2Ag2O(s)4Ag(s)+O2(g) (b) SnO(s)+CO(g)Sn(s)+CO2(g) (c) Cr2O3(s)+3H2(g)2Cr(s)+3H2O(l) (d) 2Al(s)+Fe2O3(s)Al2O(s)+2Fe(s)arrow_forwardsample of natural gas is analyzed and found to be88.4% methane (CH4) and 11.6% ethane (C2H6) bymass. The standard enthalpy of combustion of methaneto gaseous carbon dioxide (CO2) and liquid water (H2O) is -891 kJ/mol. Write the equation for the combustionof gaseous ethane to carbon dioxide and water.Calculate the standard enthalpy of combustion of ethaneusing standard enthalpies of formation from Table R-11on page 975. Using that result and the standard enthalpyof combustion of methane in Table 15.3, calculate theenergy released by the combustion of 1 kg of natural gas.arrow_forward
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