Concept explainers
(a)
Interpretation:
The intermolecular interaction that increases with molecular size is to be stated.
Concept introduction:
There are three types of interactions through which the molecules are stabilized. They are hydrogen-bonding interactions, the dipole-dipole interactions and the induced dipole interactions. These interactions influence the properties of the compounds like boiling point, melting point and so on.
(b)
Interpretation:
The intermolecular interaction that is responsible for high melting point, boiling point, and other abnormal properties of water is to be stated.
Concept introduction:
There are three types of interactions through which the molecules are stabilized. They are hydrogen-bonding interactions, the dipole interactions and the induced dipole interactions. These interactions influence the properties of the compounds like boiling point, melting point and so on.
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Chapter 15 Solutions
Introductory Chemistry: An Active Learning Approach
- Are changes in state physical or chemical changes? Explain. What type of forces must be overcome to melt or vaporize a substance (are these forces intramolecular or intermolecular)? Define the molar heat of fusion and molar heat of vaporization. Why is the molar heat of vaporization of water so much larger than its molar heat of fusion? Why does the boiling point of a liquid vary with altitude?arrow_forwardWhat is the equilibrium between liquid water and water vapor?arrow_forwardExplain which intermolecular force is primarily responsible for the unusually high boiling point of water?arrow_forward
- 4. What is the relationship between a liquid's molecular weight and the strength of intermolecular bonds (assume the liquid is only compared to other liquids that lo similar intermolecular bonds)? Use the molecular structures and weights of ethano and methanol, the types of intra- and inter- molecular bonds they make and the observations you made of ethanol and methanol in this investigation to support your answer. What is different about water's molecular structure that makes water not follow this relationship when compared to ethanol and methanol?arrow_forwardWhen a vacuum is created on a certain amount of water contained in a rigid, airtight container, certain effects are observed. Indicate which of them does not occur:(A). The temperature of the water decreases(B). The vapor pressure of the water decreases(C). The mass of liquid water decreases(D). The water decomposes into H2 and O2, gases that remain in equilibrium with the liquid phasearrow_forwardChemistry Compare the ΔH of vaporization of different liquids (polar and nonpolar, including heptane) and discuss the differences in terms of intermolecular forces and molecular structure.arrow_forward
- The kinetic molecular model relates accordingly to the intermolecular behavior of matter. Which of the following correctly illustrates the relationship of the two? Intermolecular Forces of Attraction relates directly to Kinetic Energy. Intermolecular Forces of Attraction is stronger when Kinetic Energy is weak. Intermolecular Forces of Attraction increases with temperature. Intermolecular Forces of Attraction is stronger in order of solid, liquid and gas.arrow_forwardHow do intermolecular forces of attraction define the properties and uses of matter? Using the concepts of bond polarity and solubility, explain why ethanol (rubbing alcohol) and water are miscible, but oil and water are immiscible. Using the concept of intermolecular forces of attraction, explain why butter remains solid when refrigerated, but melts at room temperature or when heated.arrow_forwardarrow_forwardA change in color of a hydrate salt after heating indicates the removal of water molecules. true or false? Which of the following is FALSE about the water molecule? - Intermolecular forces among water molecules are the least extensive when it is in liquid form. - The atoms comprising the water molecule are covalently bonded with one another. - Its molecular geometry is not linear. - The H atoms bear the partial positive charge.arrow_forwardExplain why water boils at higher temperature under higher pressure (pure substance saturation temperature depends on pressure). Use knowledge of energy and energy transferring at molecular or atomic level during the phase change of a substance. You do not need to show calculations. • (a) the amount of heat absorbed as 1 kg of saturated liquid water boils at 100°C. (b) the amount of heat released as 1 kg of saturated water vapor condenses. Is a >b, a=b, or aarrow_forwardWhat are adhesive forces? a)The intermolecular attraction forces that make molecules of one substance stick to surfaces with which they come into contact. b)The forces that make some molecules denser than others. c)The forces that attract positive and negative particles to each other. d)The intermolecular attraction forces that make molecules of one substance repel the surfaces with which they come into contact.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_iosRecommended textbooks for you
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