
Concept explainers
(a)
Interpretation:
From the given set of compounds, the compounds with highest boiling point, lowest freezing point, smallest vapor pressure, greatest viscosity, greatest heat of vaporization, smallest enthalpy of fusion have to be identified and the same has to be justified.
Concept Introduction:
Matter is generally classified into three distinct categories viz., solid state, liquid state, gaseous state. In all of these three states of matter, the constituents (molecules or ions) of the matter do possess forces between them which are not the same in each state. These forces are called intermolecular forces.
The intermolecular forces are relatively strong in the solids than liquids and weaker in the gaseous substances. This variation influences many of the properties of all the three distinct
The strength of intermolecular forces is,
(a)

Answer to Problem 42E
The compound with highest boiling point is
Explanation of Solution
Identify the compound which has highest boiling point and justify it.
Analyze why the other compounds don’t have the highest boiling point and justify the same.
The compounds other than
The compound with the highest boiling point is identified and the same is justified.
(b)
Interpretation:
From the given set of compounds, the compounds with highest boiling point, lowest freezing point, smallest vapor pressure, greatest viscosity, greatest heat of vaporization, smallest enthalpy of fusion have to be identified and the same has to be justified.
Concept Introduction:
Matter is generally classified into three distinct categories viz., solid state, liquid state, gaseous state. In all of these three states of matter, the constituents (molecules or ions) of the matter do possess forces between them which are not the same in each state. These forces are called intermolecular forces.
The intermolecular forces are relatively strong in the solids than liquids and weaker in the gaseous substances. This variation influences many of the properties of all the three distinct states of the matter. Compounds with strong intermolecular forces have high melting point, boiling point, freezing point, viscosity enthalpy of vaporization, enthalpy of fusion and low vapor pressure.
The strength of intermolecular forces is,
(b)

Answer to Problem 42E
The compound with lowest freezing point is
Explanation of Solution
Identify the compound which has lowest freezing point and justify it.
The compound with lowest freezing point is
Analyze why the other compounds don’t have the lowest freezing point and justify the same.
The compounds other than
The other compounds
The compound with the lowest boiling point is identified and the same is justified.
(c)
Interpretation:
From the given set of compounds, the compounds with highest boiling point, lowest freezing point, smallest vapor pressure, greatest viscosity, greatest heat of vaporization, smallest enthalpy of fusion have to be identified and the same has to be justified.
Concept Introduction:
Matter is generally classified into three distinct categories viz., solid state, liquid state, gaseous state. In all of these three states of matter, the constituents (molecules or ions) of the matter do possess forces between them which are not the same in each state. These forces are called intermolecular forces.
The intermolecular forces are relatively strong in the solids than liquids and weaker in the gaseous substances. This variation influences many of the properties of all the three distinct states of the matter. Compounds with strong intermolecular forces have high melting point, boiling point, freezing point, viscosity enthalpy of vaporization, enthalpy of fusion and low vapor pressure.
The strength of intermolecular forces is,
(c)

Answer to Problem 42E
The compound with lowest vapor pressure is
Explanation of Solution
Identify the compound which has lowest vapor pressure and justify it.
The compound
A boiling liquid partly vaporizes and the vaporized molecules do exist in equilibrium with the liquid molecules. The pressure exerted by the vaporized molecules is termed as vapor pressure. Molecules are able to move freely if the intermolecular forces are weak. The more the free movement of molecules the more will be the pressure exerted by them. If the intermolecular forces are strong, the movement of the molecules is restricted to some extent that the pressure exerted by them will be low. Thus increase in the strength of intermolecular forces in a substance decreases its vapor pressure.
Analyze why the other compounds don’t have the lowest vapor pressure and justify the same.
The intermolecular forces exist in them are not of high strength.
In
The compound with the lowest vapor pressure is identified and the same is justified.
(d)
Interpretation:
From the given set of compounds, the compounds with highest boiling point, lowest freezing point, smallest vapor pressure, greatest viscosity, greatest heat of vaporization, smallest enthalpy of fusion have to be identified and the same has to be justified.
Concept Introduction:
Matter is generally classified into three distinct categories viz., solid state, liquid state, gaseous state. In all of these three states of matter, the constituents (molecules or ions) of the matter do possess forces between them which are not the same in each state. These forces are called intermolecular forces.
The intermolecular forces are relatively strong in the solids than liquids and weaker in the gaseous substances. This variation influences many of the properties of all the three distinct states of the matter. Compounds with strong intermolecular forces have high melting point, boiling point, freezing point, viscosity enthalpy of vaporization, enthalpy of fusion and low vapor pressure.
The strength of intermolecular forces is,
(d)

Answer to Problem 42E
The compound with greatest viscosity is
Explanation of Solution
Identify the compound which has highest viscosity and justify it.
Viscosity of a liquid is its resistance to flow. A liquid is said to be highly viscous if it hardly flows. When the intermolecular forces are strong, the molecules are unable to move freely. The strong hydrogen bonding in the molecules of
Analyze why the other compounds don’t have the highest viscosity and justify the same.
The intermolecular forces exist in them are not of high strength.
The compound with the highest viscosity is identified and the same is justified.
(e)
Interpretation:
From the given set of compounds, the compounds with highest boiling point, lowest freezing point, smallest vapor pressure, greatest viscosity, greatest heat of vaporization, smallest enthalpy of fusion have to be identified and the same has to be justified.
Concept Introduction:
Matter is generally classified into three distinct categories viz., solid state, liquid state, gaseous state. In all of these three states of matter, the constituents (molecules or ions) of the matter do possess forces between them which are not the same in each state. These forces are called intermolecular forces.
The intermolecular forces are relatively strong in the solids than liquids and weaker in the gaseous substances. This variation influences many of the properties of all the three distinct states of the matter. Compounds with strong intermolecular forces have high melting point, boiling point, freezing point, viscosity enthalpy of vaporization, enthalpy of fusion and low vapor pressure.
The strength of intermolecular forces is,
(e)

Answer to Problem 42E
The compound with greatest heat of vaporization is
Explanation of Solution
Identify the compound which has highest heat of vaporization and justify it.
The compound with highest heat of vaporization is
Analyze why the other compounds don’t have the highest heat of vaporization and justify the same.
The low strength of intermolecular forces in
Unlike
The compound with the highest heat of vaporization is identified and the same is justified.
(f)
Interpretation:
From the given set of compounds, the compounds with highest boiling point, lowest freezing point, smallest vapor pressure, greatest viscosity, greatest heat of vaporization, smallest enthalpy of fusion have to be identified and the same has to be justified.
Concept Introduction:
Matter is generally classified into three distinct categories viz., solid state, liquid state, gaseous state. In all of these three states of matter, the constituents (molecules or ions) of the matter do possess forces between them which are not the same in each state. These forces are called intermolecular forces.
The intermolecular forces are relatively strong in the solids than liquids and weaker in the gaseous substances. This variation influences many of the properties of all the three distinct states of the matter. Compounds with strong intermolecular forces have high melting point, boiling point, freezing point, viscosity enthalpy of vaporization, enthalpy of fusion and low vapor pressure.
The strength of intermolecular forces is,
(f)

Answer to Problem 42E
The compound with lowest enthalpy of fusion is
Explanation of Solution
Identify the compound which has lowest enthalpy of fusion and justify it.
The compound with lowest enthalpy of fusion is
Analyze why the other compounds don’t have the lowest enthalpy of vaporization and justify the same.
The intermolecular forces in the compounds given except
The compound with the lowest enthalpy of fusion is identified and the same is justified.
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Chapter 10 Solutions
Chemistry with Access Code, Hybrid Edition
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