Test Review #1a

Fully explain how you are able to drink from a straw.

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Before you start drinking, what is inside the straw?

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Test Review #1b

Describe the relationships in the graphs as direct, inverse, linear, and/or nonlinear.

A

B

C

D

Test Review #1a KEY

Fully explain how you are able to drink from a straw.

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There is air in the straw. When you suck on the straw, you remove the air. If there is less air in the straw, these particles will collide less with the fluid at the bottom of the straw. This creates less pressure. The outside air pressure pushes the fluid up the straw.

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Test Review #1b KEY

A- direct and linear

B- inverse and nonlinear

C- direct and nonlinear

D- inverse and linear

Test Review #1b KEY

Describe the relationships in the graphs as direct, inverse, linear, and/or nonlinear.

A

B

C

D

Direct, linear

inverse, nonlinear

Direct, nonlinear

inverse, linear

Test Review #2

• If you have 22.4 L of a gas at 2.00 atmospheres of pressure, what is the pressure if its new volume is 3.00 L?

Test Review #2 KEY

• If you have 22.4 L of a gas at 2.00 atmospheres of pressure, what is the pressure if its new volume is 3.00 L?

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P₁V₁=P₂V₂

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P₁= 2.00 atm

V₁= 22.4 L

P₂= ?

V₂= 3.00 L

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P₂= 14.9 atm

Test Review #3

• If you have 14.9 L of a gas at 25 ºC, what is the temperature if its new volume is 20.0 L?

Test Review #3 KEY

• If you have 14.9 L of a gas at 25 ºC, what is the temperature if its new volume is 20.0 L?

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V₁T₂=V₂T₁

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V₁= 14.9 L

V₂= 20.0 L

T₁= 25 ˚C + 273 = 298 K

T₂= ?

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T₂= 400. K

Test Review #4

• If you have 1.00 mole of a gas at 0.00 ºC and 101.3 kPa of pressure, what is its volume?

Test Review #4 KEY

• If you have 1.00 mole of a gas at 0.00 ºC and 101.3 kPa of pressure, what is its volume?

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PV = nRT

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P= 101.3 kPa

V= ?

n= 1.00 moles

R= 8.3145 L kPa/ mol K

T= 0.00˚C + 273 = 273 K

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V= 22.4 L

Test Review #5

Test Review #5

Test Review #5 KEY

1. 34 mmHg more pressure. 821 mmHg total

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• 33 mmHg less pressure. 704 mmHg total

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• 758 mmHg = 101 kPa

Test Review #6

You have an unknown volume of gas held at a temperature of 115 K in a container with a pressure of 60 atm. If by increasing the temperature to 225 K and decreasing the pressure to 30. atm causes the volume of the gas to be 29 L, how many liters of gas did you start with?

Test Review #6 KEY

You have an unknown volume of gas held at a temperature of 115K in a container with a pressure of 60.atm. If by increasing the temperature to 225K and decreasing the pressure to 30.atm causes the volume of the gas to be 29L, how many liters of gas did you start with?

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P₁V₁T₂=P₂V₂T₁

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V₁= ?

P₁= 60. atm

T₁= 115 K

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V₂= 29 L

P₂= 30. atm

T₂= 225 K

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V₁= 7.41 L

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