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 111QRT
Interpretation Introduction
Interpretation:
The statement of faster cooking of macaroni in higher altitudes has to explained.
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Consider the melting points of the substances below (see figures for two compounds). Explain the trend in melting point using your knowledge of intermolecular forces. (In the structures below, carbon is black, hydrogen is white, and oxygen is red.)
Substance
Melting Point (°C)
Molar Mass (g/mol)
Cl2
−102
71
Ethyl formate (CH3CH2OCHO)
−80
74
Propionic acid (CH3CH2COOH)
−20
74
Br2
−7.2
160
1. ReShayla was making pancakes and decided that she wanted hot syrup on her pancakes.
As she poured the syrup into a bowl, it came out slowly. After she heated it in the
microwave for a few seconds, she poured the syrup onto her pancakes and it came out
quickly. Why did the syrup come out quicker after she warmed it up?
a. Its surface tension decreased because the radiation from the microwave broke the
intermolecular forces it had.
b. The radiation from the microwave increased its viscosity by breaking the syrup's
intermolecular forces.
c. Its surface tension increased because the radiation from the microwave broke the
intermolecular forces it had.
d. The radiation from the microwave decreased its viscosity by breaking the syrup's
intermolecular forces.
2. The energy to change one mole of a substance from a liquid to a vapor at its boiling point
is
a. molar heat of fusion
b. molar heat of vaporization
c. molar heat of boiling
d. critical heat
3. Dr. Rodriguez-Bussey measures the…
What is the difference between a chemical and physical change?
What is the difference between an intermolecular force and an intramolecular force?
Explain why it takes more energy to break an intramolecular force than it does an intermolecular force.
Define viscosity.
Describe what surface tension is and how you know that water has a higher surface tension than alcohol.
If a substance has a high viscosity, then it has strong intermolecular forces. For example, in the investigation we did, we found that room-temperature corn syrup had stronger intermolecular forces/higher viscosity than the hot corn syrup because it took longer for it to pour out of the beaker.
Describe cohesion and adhesion and how they relate to your everyday life.
Substances with high boiling, melting, and freezing points have stronger intermolecular forces.
Four types of intermolecular forces: dispersion forces, hydrogen bonds (H-O, H-F, H-N), ion-dipole, dipole-dipole
Which intermolecular force exists…
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 amount of heat required to melt 2 lbs of ice is twice the amount of heat required to melt 1 lb of ice. Is this observation a macroscopic or microscopic description of chemical behavior? Explain your answer.arrow_forwardThere are three sets of sketches below, showing the same pure molecular compound (ammonia, molecular formula NH,) at three different temperatures. The sketches are drawn as if a sample of ammonia were under a microscope so powerful that individual atoms could be seen. Only one sketch in each set is correct. Use the slider to choose the correct sketch in each set. You may need the following information: melting point of NH3: – 77.7 °C boiling point of NH3: – 33.3 °C 00 A (Choose one) (Choose one) (Choose one) do 4 5 4 5. 21. °C - 60. °C - 89. °C Tra JAN .. W 14 ... MacBook Air DII DD 80 000 000 F11 F7 F8 F9 F10 F1 F4 F5 F6 F2 F3arrow_forwardA pure sample of Substance S is put into an evacuated flask. The flask is then heated steadily and the temperature measured as time passes. The results are graphed below, in the middle (in green). Identical experiments are now run on Substance Y and Substance Z. Substance Y is just like S except that it has a higher heat capacity in the solid phase C₂ (s). Substance Z is just like S except that it has a lower enthalpy of vaporization H. Select the graphs below, on the left and right, that show the results you expect for these new experiments. Substance Y •C₁ (s)) (higher Cp (Drag the slider to choose an image) temperature (°C) Substance S added heat (kJ/mol) Substance Z (lower H₂) (Drag the slider to choose an image) ³ 5arrow_forward
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