Chemistry for Engineering Students
3rd Edition
ISBN: 9781285199023
Author: Lawrence S. Brown, Tom Holme
Publisher: Cengage Learning
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Question
Chapter 5, Problem 5.110PAE
Interpretation Introduction
Interpretation:
Average density of dry air should be identified.
Concept introduction:
Average density is the summation of all the gases divided by total numbre of gases available in it as follows:
From ideal gas equation
Density can be written as:
Hence,
Given:
Mole % N2 = 31.929 %
Mole % O2 = 8.567 %
Mole % Ar = 0.382 %
Mole % CO2 = 0.013 %
Mole % other = 0.002 %
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Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime (calcium oxide), which they produced by roasting limestone
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1. Write a balanced chemical equation, including physical state symbols, for the
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2. Suppose 43.0 L of carbon dioxide gas are produced by this reaction, at a
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Explanation
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Suppose we have a gas confined to a cylinder with a movable piston that is sealed so there are no leaks. (Sections 5.2, 5.3)How will each of the following changes affect (i) the pressure of the gas, (ii) the number of moles of gas in the cylinder, (iii) theaverage distance between molecules: (a) Heating the gas while maintaining a constant pressure; (b) Reducing the volume whilemaintaining a constant temperature; (c) Injecting additional gas while keeping the temperature and volume constant.
Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime (calcium oxide), which they produced by
roasting limestone (calcium carbonate).
1. Write a balanced chemical equation, including physical state symbols, for the
decomposition of solid calcium carbonate (CaCO,) into solid calcium oxide and
gaseous carbon dioxide.
2. Suppose 37.0 L of carbon dioxide gas are produced by this reaction, at
temperature of 310.0 °C and pressure of exactly 1 atm. Calculate the mass of
calcium carbonate that must have reacted. Be sure your answer has the correct number
of significant digits.
Chapter 5 Solutions
Chemistry for Engineering Students
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