Gases Chemistry Worksheet - Chapter 13, An Introduction To Chemistry
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49C
13
hapter
G
ases
t’s Monday morning, and Lilia is walking out of the chemistry building, thinking
13.1 Gases and Their
about the introductory lecture on gases that her instructor just presented. Dr.
Properties
Scanlon challenged the class to try to visualize gases in terms of the model she
13.2 Ideal Gas
described, so Lilia looks at her hand and tries to picture the particles in the air
Calculations
23
bombarding her skin at a rate of 10
collisions per second. Lilia has high hopes that a
week of studying gases will provide her with answers to the questions her older brothers
13.3 Equation
and sisters posed to her the night before at a family dinner.
Stoichiometry and
Ideal Gases
When Ted, who is a mechanic for a Formula One racing team, learned that Lilia
was going to be studying gases in her chemistry class, he asked her to find out how to
13.4 Dalton’s Law of
calculate gas density. He knows that when the density of the air changes, he needs to
Partial Pressures
adjust the car’s brakes and other components to improve its safety and performance.
John, who is an environmental scientist, wanted to be reminded why balloons that
carry his scientific instruments into the upper atmosphere expand as they rise. Amelia
is an artist who recently began to add neon lights to her work. After bending the tubes
into the desired shape, she fills them with gas from a high pressure cylinder. She wanted
to know how to determine the number of tubes she can fill with one cylinder.
Lilia’s sister Rebecca, the oldest, is a chemical engineer who could answer Ted’s,
John’s, and Amelia’s questions, but to give Lilia an opportunity to use her new
knowledge, she keeps quiet except to describe a gas-related issue of her own. Rebecca
is helping to design an apparatus in which two gases will react at high temperature,
and her responsibility is to equip the reaction vessel with a valve that will keep the
pressure from rising to dangerous levels. She started to explain to Lilia why increased
temperature leads to increased pressure, but when Lilia asked what gas pressure was
and what caused it, Rebecca realized that she had better save her explanation for the
The gas particles in the air
next family dinner. Lilia (like yourself ) will learn about gas pressures and many other
around us are constantly
gas related topics by reading Chapter 13 of her textbook carefully and listening closely
colliding with our skin.
in lecture.
Review Skills
The presentation of information in this chapter assumes that you can already perform
the tasks listed below. You can test your readiness to proceed by answering the Review
Questions at the end of the chapter. This might also be a good time to read the Chapter
Objectives, which precede the Review Questions.
Describe the particle nature of gases. (Section
substance or volume of a solution
2.1)
containing a given molarity of one of the
Convert between temperatures in the Celsius
substances. (Sections 10.1 and 10.3)
and Kelvin scales. (Section 8.6)
Given an actual yield and a theoretical
Convert the amount of one substance in
yield for a chemical reaction (or enough
a given reaction to the amount of another
information to calculate a theoretical
substance in the same reaction, whether the
yield), calculate the percent yield for the
amounts are described by mass of pure
reaction. (Section 10.2)
483
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