Textbook Question
(a) Which type of intermolecular attractive force operates between all molecules?
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Ch.11 - Liquids and Intermolecular Forces
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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Table of contents
- Ch.1 - Introduction: Matter, Energy, and Measurement111
- Ch.2 - Atoms, Molecules, and Ions166
- Ch.3 - Chemical Reactions and Reaction Stoichiometry138
- Ch.4 - Reactions in Aqueous Solution127
- Ch.5 - Thermochemistry104
- Ch.6 - Electronic Structure of Atoms109
- Ch.7 - Periodic Properties of the Elements107
- Ch.8 - Basic Concepts of Chemical Bonding102
- Ch.9 - Molecular Geometry and Bonding Theories120
- Ch.10 - Gases122
- Ch.11 - Liquids and Intermolecular Forces79
- Ch.12 - Solids and Modern Materials102
- Ch.13 - Properties of Solutions99
- Ch.14 - Chemical Kinetics153
- Ch.15 - Chemical Equilibrium83
- Ch.16 - Acid-Base Equilibria109
- Ch.17 - Additional Aspects of Aqueous Equilibria117
- Ch.18 - Chemistry of the Environment60
- Ch.19 - Chemical Thermodynamics109
- Ch.20 - Electrochemistry113
- Ch.21 - Nuclear Chemistry79
- Ch.22 - Chemistry of the Nonmetals52
- Ch.23 - Transition Metals and Coordination Chemistry57
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry7
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Not the one you use?Change textbook
Chapter 11, Problem 15c
At standard temperature and pressure, the molar volumes of Cl2 and NH3 gases are 22.06 and 22.40 L, respectively. (c) The densities of crystalline Cl2 and NH3 at 160 K are 2.02 and 0.84 g/cm3, respectively. Calculate their molar volumes.
Verified step by step guidance1
Convert the densities from g/cm³ to g/L by multiplying the given densities by 1000, because 1 cm³ is equivalent to 0.001 L.
Use the molar mass of Cl2 (approximately 70.90 g/mol) and NH3 (approximately 17.03 g/mol) to calculate the molar volumes. The molar volume can be calculated using the formula: Molar Volume = Molar Mass / Density.
Substitute the molar mass of Cl2 and the converted density into the formula to calculate the molar volume of Cl2.
Substitute the molar mass of NH3 and the converted density into the formula to calculate the molar volume of NH3.
Ensure the units are consistent throughout the calculations and convert the final molar volumes into appropriate units if necessary.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Molar Volume
Molar volume is the volume occupied by one mole of a substance at a given temperature and pressure, typically measured in liters per mole (L/mol). At standard temperature and pressure (STP), the molar volume of an ideal gas is approximately 22.4 L/mol. This concept is crucial for understanding gas behavior and comparing the volumes of different gases under similar conditions.
Density
Density is defined as mass per unit volume, commonly expressed in grams per cubic centimeter (g/cm³) or kilograms per liter (kg/L). It is an important property that helps in determining how much mass of a substance is contained in a specific volume. In the context of gases, density can be used to calculate molar volume when combined with the ideal gas law.
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Ideal Gas Law
The ideal gas law is a fundamental equation in chemistry that relates the pressure, volume, temperature, and number of moles of an ideal gas, expressed as PV = nRT. This law allows for the calculation of various properties of gases, including molar volume, under different conditions. Understanding this law is essential for solving problems involving gas behavior and conversions.
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Related Practice
Textbook Question
(c) What happens to a gas if you put it under extremely high pressure?
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Textbook Question
At standard temperature and pressure, the molar volumes of Cl2 and NH3 gases are 22.06 and 22.40 L, respectively. (d) Are the molar volumes in the solid state as similar as they are in the gaseous state?
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Textbook Question
(a) How does the average kinetic energy of molecules com- pare with the average energy of attraction between mole- cules in solids, liquids, and gases?
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Textbook Question
(b) Which type of intermolecular attractive force operates only between polar molecules?
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