To Do… Slides on the website (after each lecture) Discussion tomorrow. Look at final two...
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Transcript of To Do… Slides on the website (after each lecture) Discussion tomorrow. Look at final two...
To Do… http://chem.illinois.edu Slides on the website (after each
lecture) Discussion tomorrow. Look at
final two problems. Lon-Capa (HW3 Type 1 due
Monday, February 10 by 7 pm).1
Studying Gases Good way to study the process of
science. Distinguish between laws (what)
and theories (why). Make observations. Use observations to develop
theories. Make more observations. Continue. 2
Gases – Macroscopic Observations
Gases take up the volume of the container. 1 cup of helium? Compressible
Gases mix well (diffusion). We can smell ammonia, vinegar, etc.
Gases exert pressure. Basketballs, bike tires, etc. Explosions
3
Clicker Question You are holding two balloons filled with air – a large balloon and a small balloon. What can be said about the relative pressure of air in each balloon?
a) The larger balloon has a significantly greater pressure.
b) The smaller balloon has a significantly greater pressure.
c) The balloons have essentially the same pressure.
4
Clicker Question You are holding two balloons filled with air – a large balloon and a small balloon. What can be said about the relative pressure of air in each balloon?
a) The larger balloon has a significantly greater pressure.
b) The smaller balloon has a significantly greater pressure.
c) The balloons have essentially the same pressure (and it is equal to room pressure).
5
Clicker Question
As the number of moles of carbon dioxide increases, the pressure in the bag will
A) increase B) decrease C) stay the same
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Clicker Question
As the pressure inside the chamber decreases, the volume of the balloon will
A) increase B) decreaseC) stay the same
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Clicker Question
As the temperature of the gas inside the balloon decreases, the volume will
A) increase B) decrease C) stay the same
8
Clicker Question
As the temperature of the gas inside the flask increases, the pressure will
A) increase B) decrease C) stay the same
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Clicker Question
Which of the following best represents the relationship between volume and moles of gas at constant pressure and temperature?
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Clicker Question
Which of the following best represents the relationship between volume and moles of gas at constant pressure and temperature? [a]
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Clicker Question
Which of the following best represents the relationship between pressure and volume of gas at constant moles and temperature?
12
Clicker Question
Which of the following best represents the relationship between pressure and volume of gas at constant moles and temperature? [d]
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