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Chemistry

Terms in this set (33)

The genetic molecular theory explains...
D: All of the above
What measurable quantities are held constant in a Boyle's Law problem?
B: n and T
What measurable quantities are held constant in a Charle's Law Problem?
E: none
What measurable quantities are held constant in a Combined Gas Law problem?
B: n only
What measurable quantity does the ideal gas law allow scientists to calculate that the other laws do not?
C: n
As altitude increases, atmospheric pressure...
B: decreases
Why does the pressure inside of a rigid container of gas increase if more gas is added into the container?
A: because n and p are directly proportional to each other
T or F, Air moves through a vacuum cleaner bc atmospheric pressure is greater than the pressure inside the vacuum cleaner.
A: True
Decreasing the temp of a fixed volume of gas decreases pressure bc...
B: the molecules are moving more
John noticed that his shampoo bottle was all puffed up after traveling from stl to the Rocky Mountains. Why did this happen?
B: the pressure in the Rockies is less than in stl, causing the bottle to expand
The volume of a container of gas at a fixed pressure is reduced. What will happen to the temp if the pressure remains constant while the volume is reduced?
B: Decreases
A sample of gas at constant volume and pressure is cooled. In order to keep pressure and
volume constant, what must happen?
A: Moles of gas must increase
The volume of a gas is tripled while the temperature is held constant. What happens to
pressure?
C: it decreases to 1/3 the original pressure
The temperature of a gas is reduced from 300K to 150K while the pressure is held constant.
How does the volume change?
B: it decreases to 1/2 of the original volume
What is standard pressure?
all of the above
What is standard temp?
273 K
Which of these would NOT cause an increase in the pressure of a gaseous system?
the container is made larger
As a balloon is heated at a constant pressure...
quickly/increase
Gay Lusaccs law states that pressure and temp are related...
Directly
Charles Law states that volume and temp are related...
Directly
If a capped syringe is plunged into cold water, in which direction will the syringe plunger slide?
In
The button on the lid of the jelly becomes pressed down because...
atmospheric pressure is much greater than the pressure inside the jar
When drinking through a straw...
atmospheric pressure
Heating a rigid closed container of gas is dangerous and can lead to an explosion because..
gas particles will move more rapidly causing an increase in pressure
A new aerosol can contains the liquid of interest and a gas at...
high pressure
A used up aerosol can contains gas at...
atmospheric pressure
The graph of an inverse relationship is...
a curve
The graph of a direct relationship is...
a straight line
When collecting hydrogen - other gas
water vapor
When working exclusively w gases in a reaction, the coefficients in a chemical equation can represent units of moles or units of...
volume
The gas in a hot air balloon is heated in order to make the balloon float, whats the best explanation?
gas particles move more quickly
A vacuum cleaner is most similar to which of the following?
drinking water with a straw
in order for water to boil, the vapor pressure of the water itself must...
increase so that it is equal to the atmospheric pressure
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