Chemistry: Structure and Properties Custom Edition for Rutgers University General Chemistry
15th Edition
ISBN: 9781269935678
Author: Nivaldo J. Tro
Publisher: Pearson Education
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Textbook Question
Chapter 12, Problem 55E
Spilling room temperature water over your skin on a hot day cools you down. Spilling room temperature vegetable oil over your skin on a hot day does not. Explain the difference.
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Spilling room-temperature water over your skin on a hot day cools you down. Spilling room-temperature vegetable oil over your skin on a hot day does not. Explain the difference.
22) Evaporation of sweat requires energy and thus take excess heat away from the body. Some of the water that you
drink may eventually be converted into sweat and evaporate. If you drink a 20-ounce bottle of water (590g) that
had been in the refrigerator at 3.8 °C, how much heat is needed to convert all of that water into sweat and then to
vapor? (Note: Your body temperature is 36.6 °C. For the purpose of solving this problem, assume that the therm
properties of sweat are the same as for water.
Us, liquid water =
4.184 J/g °C
Cs, steam= 1.84 J/g °C
C3, ice = 2.09 /g °C
AHvap = 40.67 kJ/mol at 36.6 °C.
%3D
A Hus = 6.01 kJ/mol
A) 1420 kJ
B) 81 kJ
C) 1150 kJ
23) Based on the graph shown below, choose the correct statement about sublimation?
Gas
Liquid
sublimation
Solid
A) Sublimation is a phase transition from solid to gas
B) According to Hess Law, AHsub can be calculated as sum of AHvap and AHUS
C) Both A and B are correct
at 100.0C the molar heat of vaporization of water is 40.67KJ/mol. at 25.0C approximately room temperature, the molar heat of vaporization of water is 44.0KJ/mol. during a strenuous work out, an athlete generates 2010KJ of heat energy. what mass of water would have to evaporate from the athletes skin to dissipate 2010KJ of heat? in grams
Chapter 12 Solutions
Chemistry: Structure and Properties Custom Edition for Rutgers University General Chemistry
Ch. 12 - Prob. 1SAQCh. 12 - Liquid nitrogen boils at 77 K. This image depicts...Ch. 12 - Taking intermolecular forces into account, which...Ch. 12 - What substance experiences dipole-dipole forces?...Ch. 12 - Prob. 5SAQCh. 12 - Prob. 6SAQCh. 12 - Determine the amount of heat (in kJ) required to...Ch. 12 - Prob. 8SAQCh. 12 - Prob. 9SAQCh. 12 - Prob. 10SAQ
Ch. 12 - Prob. 11SAQCh. 12 - Why do ethanol and dimethyl ether have such...Ch. 12 - Why are intermolecular forces important?Ch. 12 - Prob. 3ECh. 12 - Prob. 4ECh. 12 - Prob. 5ECh. 12 - Which factors cause transitions between the solid...Ch. 12 - Describe the relationship between the state of a...Ch. 12 - Prob. 8ECh. 12 - Prob. 9ECh. 12 - Prob. 10ECh. 12 - Prob. 11ECh. 12 - Prob. 12ECh. 12 - Prob. 13ECh. 12 - What is the ion-dipole force? Why is it important?Ch. 12 - Prob. 15ECh. 12 - Prob. 16ECh. 12 - What is capillary action? How does it depend on...Ch. 12 - Explain what happens during the processes of...Ch. 12 - Why is vaporization endothermic? Why is...Ch. 12 - Prob. 20ECh. 12 - What is the heat of vaporization for a liquid, and...Ch. 12 - Explain the process of dynamic equilibrium. How is...Ch. 12 - What happens to a system in dynamic equilibrium...Ch. 12 - Prob. 24ECh. 12 - Prob. 25ECh. 12 - Prob. 26ECh. 12 - Prob. 27ECh. 12 - Prob. 28ECh. 12 - Prob. 29ECh. 12 - Prob. 30ECh. 12 - Prob. 31ECh. 12 - Examine the heating curve for water in section...Ch. 12 - What is a phase diagram? What is the significance...Ch. 12 - Draw a generic phase diagram and label its...Ch. 12 - Prob. 35ECh. 12 - Determine the kinds of intermolecular forces that...Ch. 12 - Determine the kinds of intermolecular forces that...Ch. 12 - Prob. 38ECh. 12 - Arrange these compounds in order of increasing...Ch. 12 - Prob. 40ECh. 12 - Pick the compound with the highest boiling point...Ch. 12 - Pick the compound with the highest boiling point...Ch. 12 - Prob. 43ECh. 12 - Prob. 44ECh. 12 - Prob. 45ECh. 12 - Prob. 46ECh. 12 - Prob. 47ECh. 12 - Water (a) “wets” some surfaces and beads up on...Ch. 12 - The structures of two isomers of heptanes are...Ch. 12 - Prob. 50ECh. 12 - Water in a glass tube that contains grease or oil...Ch. 12 - When a thin glass tube is put into water, the...Ch. 12 - Which evaporates more quickly: 55 mL of water in a...Ch. 12 - Prob. 54ECh. 12 - Spilling room temperature water over your skin on...Ch. 12 - Prob. 56ECh. 12 - The human body obtains 915 kJ of energy from a...Ch. 12 - Prob. 58ECh. 12 - Suppose that 0.95 g of water condenses on a 75.0 g...Ch. 12 - Prob. 60ECh. 12 - Prob. 61ECh. 12 - Prob. 62ECh. 12 - Prob. 63ECh. 12 - Prob. 64ECh. 12 - How much energy is released when 65.8 g of water...Ch. 12 - Prob. 66ECh. 12 - An 8.5 g ice cube is placed into 255 g of water....Ch. 12 - Prob. 68ECh. 12 - Prob. 69ECh. 12 - Prob. 70ECh. 12 - Prob. 71ECh. 12 - Prob. 72ECh. 12 - Prob. 73ECh. 12 - Prob. 74ECh. 12 - Prob. 75ECh. 12 - The high-pressure phase diagram of ice is shown...Ch. 12 - Prob. 77ECh. 12 - Prob. 78ECh. 12 - Prob. 79ECh. 12 - How is the density of solid water compared to that...Ch. 12 - Prob. 81ECh. 12 - Prob. 82ECh. 12 - Prob. 83ECh. 12 - Prob. 84ECh. 12 - Four ice cubes at exactly 00C with a total mass of...Ch. 12 - Prob. 86ECh. 12 - Draw a heating curve (such as the one in Figure...Ch. 12 - Draw a heating curve (such as the one in Figure...Ch. 12 - Prob. 89ECh. 12 - A sealed flask contains 0.55 g of water at 280C....Ch. 12 - Prob. 91ECh. 12 - Prob. 92ECh. 12 - Prob. 93ECh. 12 - Given that the heat of fusion of water is —6.02...Ch. 12 - The heat of combustion of CH4 is 890.4 kJ/mol, and...Ch. 12 - Prob. 96ECh. 12 - Prob. 97E
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- xplain the following: You add 100mLof water to a 500mLround-bottomed flask and heat the water until it is boiling. You remove the heat and stopper me flask, and the boiling stops. You then run cool water over the neck of the flask, and me boiling begins again. It seems as though you are boiling water by cooling it.arrow_forwardWill a closed container of water at 70 C or an open container of water at the same temperature cool faster on a cold winter day? Explain why.arrow_forwardWhy does sweating cool the human body?arrow_forward
- Explain the following: You add 100 mL water to a 500-mL round-bottom flask and heat the water until it is boiling. You remove the heat and stopper the flask, and the boiling stops. You then run cool water over the neck of the flask, and the boiling begins again. It seems as though you are boiling water by cooling it.arrow_forwardWhich is not true regarding the specific heat of water? The specific heat of water explains capillary action. The specific heat of water is 4.18 J/( C g). Water is useful as an engine coolant because of its high specific heat The specific heat of water is the reason islands have milder climates.arrow_forwardIdentify the point(s) on the following heating curve for water where the temperature is such that only the solid can be present. (Click on the correct answer(s).)arrow_forward
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