Chemistry: The Molecular Science
5th Edition
ISBN: 9781285199047
Author: John W. Moore, Conrad L. Stanitski
Publisher: Cengage Learning
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Chapter 9, Problem 9.BCP
Interpretation Introduction
Interpretation:
The reason why butane and sulfur dioxide considered to be better refrigerants for use in house hold refrigerators than others has to be given.
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1. The enthalpy of vaporization of methanol is 37.4 kJ/mol at
25°C. Molar heat capacities for liquid and gaseous methanol are
81.6 J/mol K and 43.9 J/mol·K respectively. Assume that heat
capacities are the constant in this temperature range. Calculate
the enthalpy of vaporization at
50 °C.
The enthalpy of vaporization of CO2(l) is 9.8 kJ/mol. Would you expect the enthalpy of vaporization of CS2(l) to be 28 kJ/mol, 9.8 kJ/mol, or −8.4 kJ/mol? Discuss the plausibility of each of these answers.
Answer the following question about an aqueous solution of tetrahydrofuran (C4H8O)with a concentration of 4.20 molal.
The enthalpy of vaporization of tetrahydrofuran is 445.9 J/g. How much energy is required to convert the amount of tetrahydrofuran in the solution to vapor?
Chapter 9 Solutions
Chemistry: The Molecular Science
Ch. 9.1 - Prob. 9.1CECh. 9.2 - Prob. 9.2CECh. 9.2 - Prob. 9.1PSPCh. 9.2 - What mass (g) of ethanol, CH3CH2OH(), can be...Ch. 9.3 - Prob. 9.3CECh. 9.3 - Prob. 9.4CECh. 9.3 - Prob. 9.3PSPCh. 9.4 - What types of solids are these substances? (a) The...Ch. 9.4 - Prob. 9.5PSPCh. 9.4 - Prob. 9.5E
Ch. 9.4 - Prob. 9.6CECh. 9.4 - Sublimation is an excellent means of purification...Ch. 9.4 - Prob. 9.6PSPCh. 9.4 - Prob. 9.8ECh. 9.4 - Prob. 9.9ECh. 9.5 - Predict which liquid—glycerol, HOCH2CH(OH)CH2OH,...Ch. 9.5 - Prob. 9.11CECh. 9.6 - Crystalline polonium has a primitive cubic unit...Ch. 9.6 - Calculate the unit cell edge length of copper...Ch. 9.6 - Vanadium metal crystallizes in a body-centered...Ch. 9.6 - Prob. 9.13ECh. 9.6 - Prob. 9.14ECh. 9.6 - Prob. 9.9PSPCh. 9.9 - Prob. 9.10PSPCh. 9.9 - The graph below is obtained when a liquid metal is...Ch. 9.9 - Look in Appendix D and compare the electron...Ch. 9.11 - Prob. 9.11PSPCh. 9 - Prob. ISPCh. 9 - Prob. IISPCh. 9 - Prob. IIISPCh. 9 - Prob. 1QRTCh. 9 - Prob. 2QRTCh. 9 - Prob. 3QRTCh. 9 - Prob. 4QRTCh. 9 - Prob. 5QRTCh. 9 - Prob. 6QRTCh. 9 - Which processes are endothermic? (a) Condensation...Ch. 9 - Prob. 8QRTCh. 9 - Prob. 9QRTCh. 9 - Prob. 10QRTCh. 9 - Prob. 11QRTCh. 9 - Prob. 12QRTCh. 9 - Prob. 13QRTCh. 9 - After exercising on a hot summer day and working...Ch. 9 - Prob. 15QRTCh. 9 - The molar vaporization enthalpy of methanol is...Ch. 9 - Prob. 17QRTCh. 9 - Mercury is highly toxic. Although it is a liquid...Ch. 9 - Prob. 19QRTCh. 9 - Prob. 20QRTCh. 9 - Prob. 21QRTCh. 9 - Prob. 22QRTCh. 9 - Prob. 23QRTCh. 9 - Prob. 24QRTCh. 9 - Prob. 25QRTCh. 9 - Prob. 26QRTCh. 9 - A liquid has a vapH of 38.7 kJ/mol and a boiling...Ch. 9 - Prob. 28QRTCh. 9 - The vapor pressure of ethanol, C2H5OH, at 50.0 C...Ch. 9 - Prob. 30QRTCh. 9 - Prob. 31QRTCh. 9 - Prob. 32QRTCh. 9 - Which would you expect to have the higher fusion...Ch. 9 - Prob. 34QRTCh. 9 - Prob. 35QRTCh. 9 - Prob. 36QRTCh. 9 - Prob. 37QRTCh. 9 - Prob. 38QRTCh. 9 - Prob. 39QRTCh. 9 - Prob. 40QRTCh. 9 - Prob. 41QRTCh. 9 - Prob. 42QRTCh. 9 - Prob. 43QRTCh. 9 - Prob. 44QRTCh. 9 - At the critical point for carbon dioxide, the...Ch. 9 - Prob. 46QRTCh. 9 - Prob. 47QRTCh. 9 - On the basis of the description given, classify...Ch. 9 - On the basis of the description given, classify...Ch. 9 - Prob. 50QRTCh. 9 - Prob. 51QRTCh. 9 - Prob. 52QRTCh. 9 - Prob. 53QRTCh. 9 - Prob. 54QRTCh. 9 - Prob. 55QRTCh. 9 - Prob. 56QRTCh. 9 - Prob. 57QRTCh. 9 - Prob. 58QRTCh. 9 - Prob. 59QRTCh. 9 - Prob. 60QRTCh. 9 - Prob. 61QRTCh. 9 - The ionic radii of Cs+ and Cl are 181 and 167 pm,...Ch. 9 - Prob. 63QRTCh. 9 - Prob. 64QRTCh. 9 - Prob. 65QRTCh. 9 - Tungsten has a body-centered cubic unit cell and...Ch. 9 - Prob. 67QRTCh. 9 - Prob. 68QRTCh. 9 - Prob. 69QRTCh. 9 - Prob. 70QRTCh. 9 - Prob. 71QRTCh. 9 - Prob. 72QRTCh. 9 - Prob. 73QRTCh. 9 - Prob. 74QRTCh. 9 - Prob. 75QRTCh. 9 - Prob. 76QRTCh. 9 - Prob. 77QRTCh. 9 - Prob. 78QRTCh. 9 - Prob. 79QRTCh. 9 - Prob. 80QRTCh. 9 - Which substance has the greatest electrical...Ch. 9 - Prob. 82QRTCh. 9 - Prob. 83QRTCh. 9 - Prob. 84QRTCh. 9 - Prob. 85QRTCh. 9 - Prob. 86QRTCh. 9 - What makes a glass different from a crystalline...Ch. 9 - Prob. 88QRTCh. 9 - Prob. 89QRTCh. 9 - Prob. 90QRTCh. 9 - Will a closed container of water at 70 C or an...Ch. 9 - Prob. 92QRTCh. 9 - Prob. 95QRTCh. 9 - Prob. 96QRTCh. 9 - Prob. 97QRTCh. 9 - Prob. 98QRTCh. 9 - Prob. 99QRTCh. 9 - Prob. 100QRTCh. 9 - Prob. 101QRTCh. 9 - Prob. 102QRTCh. 9 - Prob. 103QRTCh. 9 - Consider this information regarding two compounds....Ch. 9 - Prob. 105QRTCh. 9 - Prob. 106QRTCh. 9 - If you get boiling water at 100 C on your skin, it...Ch. 9 - Prob. 108QRTCh. 9 - The normal boiling point of SO2 is 263.1 K and...Ch. 9 - Butane is a gas at room temperature; however, if...Ch. 9 - Prob. 111QRTCh. 9 - Examine the nanoscale diagrams and the phase...Ch. 9 - Consider the phase diagram and heating-curve...Ch. 9 - Prob. 115QRTCh. 9 - Prob. 116QRTCh. 9 - The phase diagram for water over a relative narrow...Ch. 9 - Prob. 118QRTCh. 9 - Prob. 119QRTCh. 9 - Prob. 120QRTCh. 9 - Prob. 121QRTCh. 9 - Prob. 122QRTCh. 9 - Titanium metal crystallizes in a body-centered...Ch. 9 - Prob. 9.ACPCh. 9 - Prob. 9.BCPCh. 9 - Prob. 9.CCP
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- The enthalpy change when 1 mol methane (CH4) is burned is 890 kJ. It takes 44.0 kJ to vaporize 1 mol water. What mass of methane must be burned to provide the heat needed to vaporize 1.00 g water?arrow_forwardThe cooling effect of alcohol on the skin is due to its evaporation. Calculate the heat of vaporization of ethanol (ethyl alcohol), C2H5OH. C2H5OH(l)C2H5OH(g);H=? The standard enthalpy of formation of C2H5OH(l) is 277.7 kJ/mol and that of C2H5OH(g) is 235.1 kJ/mol.arrow_forwardFrom the molar heats of formation in Appendix G, determine how much heat is required to evaporate one mole of water: H2O(l)H2O(g)arrow_forward
- How much heat is produced by combustion of 125 g of methanol under standard state conditions?arrow_forwardWhat is a driving force? Name two common and important driving forces, and give an example of each. What is entropy? Although the total energy of the universe is constant, is the entropy of the universe constant? What is a spontaneous process?arrow_forwardThe enthalpy of combustion of CH4(g) when H2O(l) is formed is 891 kJ/mol and the enthalpy of combustion of CH4(g) when H2O(g) is formed is 803 kJ/mol. Use these data and Hesss law to determine the enthalpy of vaporization for water.arrow_forward
- Define the joule in terms of SI base units.arrow_forwardDraw a diagram like Figure 2.11 that illustrates the change in enthalpy for the chemical reaction C s 2H2 g CH4 g Which is exothermic by 74.8 kJ/mol.arrow_forwardWhich requires the absorption of a greater amount of heat—vaporizing 100.0 g of benzene or boiling 20.0 g of water? (Use Table 8.2.)arrow_forward
- Dissolving 6.00 g CaCl2 in 300 mL of water causes the temperature of the solution to increase by 3.43 C. Assume that the specific heat of the solution is 4.18 J/g K and its mass is 306 g. (a) Calculate the enthalpy change when the CaCl2 dissolves. Is the process exothermic or endothermic? (b) Determine H on a molar basis for CaCl2(s)H2OCa2+(aq)+2Cl(aq)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_forwardFor the reaction HgO(s)Hg(l)+12O2(g),H=+90.7kJ: a.What quantity of heat is required to produce 1 mole of mercury by this reaction? b.What quantity of heat is required to produce 1 mole of oxygen gas by this reaction? c.What quantity of heat would be released in the following reaction as written? 2Hg(l) + O2(g) 2HgO(s)arrow_forward
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