Introductory Chemistry (6th Edition)
6th Edition
ISBN: 9780134302386
Author: Nivaldo J. Tro
Publisher: PEARSON
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Textbook Question
Chapter 12, Problem 85E
For each pair of solids, determine which solid has the higher melting point and explain why. a. Ti(s) and Ne(s) b.
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8.) Which of the following solids will have the lowest melting point?a. H2O(s) b. Ne(s) c. Na(s) d. NaCl(s) e. C(s) (diamond)
A (made-up) metal has a face-centered cubic crystal structure. Its density is 20.5 g/cm 3. Its molar mass is 189 g/mol. What is the radius of an atom of the metal?
9.39 x 10
-7
cm
O 1.39 x 10 -8 cm
O 8.02 x 10 - cm
O 2.60 x 1o 9 cm
-8
O 1.84 cmx 10
O 2.69 x 10-8
cm
O 2.49 x 1o-9 cm
O 1.51x 10 -8 cm
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15. Calorimetry
a. How much heat needs to be taken from 0.5 kg of ethyl alcohol as a gas at its boiling point of
78.0° C to a solid at its freezing point -114° C if the latent heat of vaporization is 850,000 J/kg
and its latent heat of fusion is 104,000 J/kg, and the specific heat is 2400 J/(kg C).
b. If an piece of Iron (c = 450 J/kg C) at 65.0° C is dropped into .250 kg of ethyl alcohol at 25.0° C
and the final temperature of the two comes to 35.0° C what was the mass of the piece of iron?
c. If.35 kg
liquid ethyl alcohol initially at 35.0° C what will the final temperature be after all the solid form
solid ethyl alcohol at -114.0° C is put in a large well insulated jug holding 2.5 kg of
has melted and come to equilibrium?
Chapter 12 Solutions
Introductory Chemistry (6th Edition)
Ch. 12 - The first diagram shown here represents liquid...Ch. 12 - Prob. 2SAQCh. 12 - Prob. 3SAQCh. 12 - How many 20.0-g ice cubes are required to absorb...Ch. 12 - Prob. 5SAQCh. 12 - Prob. 6SAQCh. 12 - Prob. 7SAQCh. 12 - Prob. 8SAQCh. 12 - Prob. 9SAQCh. 12 - Prob. 10SAQ
Ch. 12 - Prob. 1ECh. 12 - Prob. 2ECh. 12 - What determines whether a substance is a solid,...Ch. 12 - 4. What are the properties of liquids? Explain the...Ch. 12 - 5. What are the properties of solids? Explain the...Ch. 12 - Prob. 6ECh. 12 - Prob. 7ECh. 12 - Prob. 8ECh. 12 - Prob. 9ECh. 12 - Why does a glass of water evaporate more slowly in...Ch. 12 - Prob. 11ECh. 12 - Prob. 12ECh. 12 - 13. Acetone evaporates more quickly than water at...Ch. 12 - Prob. 14ECh. 12 - Prob. 15ECh. 12 - Prob. 16ECh. 12 - 17. Explain why a steam burn from gaseous water at...Ch. 12 - Prob. 18ECh. 12 - Prob. 19ECh. 12 - Prob. 20ECh. 12 - Is the melting of ice endothermic or exothermic?...Ch. 12 - 22. Is the boiling of water endothermic or...Ch. 12 - Prob. 23ECh. 12 - Prob. 24ECh. 12 - 25. What is hydrogen bonding? How can you tell...Ch. 12 - Prob. 26ECh. 12 - Prob. 27ECh. 12 - Prob. 28ECh. 12 - Prob. 29ECh. 12 - Prob. 30ECh. 12 - Prob. 31ECh. 12 - 32. What is an atomic solid? What are the...Ch. 12 - Prob. 33ECh. 12 - Prob. 34ECh. 12 - Prob. 35ECh. 12 - Two samples of pure water of equal volume are put...Ch. 12 - Prob. 37ECh. 12 - Spilling water over your skin on a hot day will...Ch. 12 - Prob. 39ECh. 12 - Water is put into a beaker and heated with a...Ch. 12 - 41. Which causes a more severe burn: spilling 0.50...Ch. 12 - 42. The nightly winter temperature drop in a...Ch. 12 - Prob. 43ECh. 12 - Prob. 44ECh. 12 - 45. An ice chest is filled with 3.5 kg of ice at...Ch. 12 - Why does 50 g of water initially at 0 C warm more...Ch. 12 - In Denver, Colorado, water boils at 95. C....Ch. 12 - Prob. 48ECh. 12 - 49. How much heat is required to vaporize 33.8 g...Ch. 12 - How much heat is required to vaporize 43.9 g of...Ch. 12 - How much heat does your body lose when 2.8 g of...Ch. 12 - How much heat does your body lose when 4.86 g of...Ch. 12 - How much heat is emitted when 4.25 g of water...Ch. 12 - Prob. 54ECh. 12 - 55. The human body obtains 835 kJ of energy from a...Ch. 12 - 56. The human body obtains 1078 kJ from a candy...Ch. 12 - How much heat is required to melt 37.4 g of ice at...Ch. 12 - 58. How much heat is required to melt 23.9 g of...Ch. 12 - How much energy is released when 34.2 g of water...Ch. 12 - How much energy is released when 2.55 kg of...Ch. 12 - 61. How much heat is required to convert 2.55 g of...Ch. 12 - 62. How much heat is required to convert 5.88 g of...Ch. 12 - Prob. 63ECh. 12 - Prob. 64ECh. 12 - 65. What kinds of intermolecular forces are...Ch. 12 - Prob. 66ECh. 12 - Prob. 67ECh. 12 - What kinds of intermolecular forces are present in...Ch. 12 - Which substance has the highest boiling point?...Ch. 12 - Prob. 70ECh. 12 - One of these two substances is a liquid at room...Ch. 12 - Prob. 72ECh. 12 - 73. A flask containing a mixture of and is...Ch. 12 - 74. Explain why is a liquid at room temperature...Ch. 12 - Are CH3CH2CH2CH2CH3 and H2O miscible?Ch. 12 - Prob. 76ECh. 12 - Prob. 77ECh. 12 - 78. Determine whether a homogeneous solution forms...Ch. 12 - 79. Identify each solid as molecular, ionic, or...Ch. 12 - Prob. 80ECh. 12 - Identify each solid as molecular, ionic, or...Ch. 12 - Identify each solid as molecular, ionic, or...Ch. 12 - 83. Which solid has the highest melting point?...Ch. 12 - 84. Which solid has the highest melting point?...Ch. 12 - 85. For each pair of solids, determine which solid...Ch. 12 - For each pair of solids, determine which solid has...Ch. 12 - 87. List these substances in order of increasing...Ch. 12 - 88. List these substances in order of decreasing...Ch. 12 - 89. Ice actually has negative caloric content. How...Ch. 12 - Prob. 90ECh. 12 - An 8.5-g ice cube is placed into 255 g of water....Ch. 12 - A 14.7-g ice cube is placed into 324 g of water....Ch. 12 - 93. How much ice in grams would have to melt to...Ch. 12 - Prob. 94ECh. 12 - Prob. 95ECh. 12 - Prob. 96ECh. 12 - Draw a Lewis structure for each molecule and...Ch. 12 - Draw a Lewis structure for each molecule and...Ch. 12 - 99. The melting point of ionic solids depends on...Ch. 12 - Draw ionic Lewis structures for KF and CaO. Use...Ch. 12 - Prob. 101ECh. 12 - Prob. 102ECh. 12 - An ice cube at 0.00 C with a mass of 23.5 g is...Ch. 12 - Prob. 104ECh. 12 - Prob. 105ECh. 12 - Prob. 106ECh. 12 - Prob. 107ECh. 12 - Prob. 108ECh. 12 - Prob. 109QGWCh. 12 - Prob. 110QGWCh. 12 - Prob. 111QGWCh. 12 - Prob. 112QGWCh. 12 - Prob. 113DIA
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- An amorphous solid can sometimes be converted to a crystalline solid by a process called annealing. Annealing consists of heating the substance to a temperature just below the melting point of the crystalline form and then cooling it slowly. Explain why this process helps produce a crystalline solid.arrow_forwardFollow the step-wise process outlined in Problem 31 to calculate the amount of heat involved in condensing 100.00 g of benzene gas (C6H6) at 80.00C to liquid benzene at 25.00C. Use Tables 8.1 and 8.2 for the specific heat, boiling point, and heat of vaporization of benzene.arrow_forwardElemental carbon has one gas phase, one liquid phase, and two different solid phases, as shown in the phase diagram: (a) On the phase diagram, label the gas and liquid regions. (b) Graphite is the most stable phase of carbon at normal conditions. On the phase diagram, label the graphite phase. (c) If graphite at normal conditions is heated to 2500 K while the pressure is increased to 1010 Pa, it is converted into diamond. Label the diamond phase. (d) Circle each triple point on the phase diagram. (e) In what phase does carbon exist at 5000 K and 108 Pa? (f) If the temperature of a sample of carbon increases from 3000 K to 5000 K at a constant pressure of 106 Pa, which phase transition occurs, if any?arrow_forward
- Use the phase diagram for sulfur for Question 75. The solid forms of sulfur are rhombic and monoclinic. (a) A triple point is defined as a temperature and pressure where three phases are in equilibrium. How many triple points does sulfur have? Indicate the approximate temperature and pressure at each. (b) Which physical states are present at equilibrium under these conditions? (i) 102 atm and 80 C (ii) 101 atm and 140 C (iii) 103 atm and 110 C (iv) 104 atm and 160 C Phase diagram for sulfur, for Question 75.arrow_forwardAs minerals were formed from the molten magma, different ions occupied the same cites in the crystals. Lithium often occurs along with magnesium in minerals despite the difference in the charge on their ions. Suggest an explanation.arrow_forwardClassify each substance in the table as either a metallic, ionic, molecular, or covalent network solid: Substance Appearance Melting Point Electrical Conductivity Solubility in Water X lustrous, malleable 1500 C high insoluble Y Soft, yellow 113 C None Insoluble Z Hard, white 800 C Only if melted/dissolved solublearrow_forward
- Classify each substance in the table as either a metallic, ionic, molecular, or covalent network solid: Substance Appearance Melting Point Electrical Conductivity Solubility in Water X brittle, white 800 C only if melted/dissolved soluble Y shiny, malleable 1100 C high insoluble X hard, colorless 3550 C none insolublearrow_forwardNaH crystallizes with the same ciystal structure as NaCl. The edge length of the cubic unit cell of NaH is 4.880. (a) Calculate the ionic radius of H. (The ionic radius of Li+ is 0.0.95 .) (b) Calculate the density of NaH.arrow_forwardA common prank on college campuses is to switch the salt and sugar on dining hall tables, which is usually easy because the substances look so much alike. Yet, despite the similarity in their appearance, these two substances differ greatly in their properties, since one is a molecular solid and the other is an ionic solid. How do the properties differ and why?arrow_forward
- At 20. C the vapor pressure of white phosphorus is 0.0254 mmHg; at 40. C it is 0.133 mmHg. Use the Clausius-Clapeyron equation to estimate the heat of sublimation (J/mol) of white phosphorus.arrow_forwardConsider two different organic compounds, each with the formula C2H6O. One of these compounds is a liquid at room conditions and the other is a gas. Write Lewis structures consistent with this observation, and explain your answer. (Hint: The oxygen atom in both structures satisfies the octet rule with two bonds and two lone pairs.)arrow_forwardConsider the phase diagram and heating-curve graphs for Question 113. Draw corresponding heating curves for T1 to T2 at pressures P1 and P2. Label each phase and phase change on your heating curves.arrow_forward
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