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Write a definition for the vocab word diffusion.

8Category 1 10Diffusion is the process of gases mixing due to the random motion and collisions of gas molecules; gas molecules diffuse from an area of high concentration to an area of low concentration.AnnouncementsUnit #4 Exam: TOMORROW!Monday: 25 Multiple Choice, Vocab and 5 Free ResponseCheck lpsroyalchemistry.com website and my Facebook for updates on Internet Review Session

Standard Temperature and PressureA set of conditions set by scientists that allows for comparison of data and minimizes error

When you read STP, automatically write 0 OC and 1 atmGases JeopardyLets Get MovinThe Situation.The Three Stooges. Royal Gas LawRandom10101010102020202020303030303040404040405050505050Gas Law Reminders1 atm = 760 mmHg

1000 mL = 1 L

K = C + 273

Grams MolesDiffusio5Expectations:Only chemistryBoth partners are responsible for the answerTalking only loudly enough for your partner to hear youYour board must be up before the song ends!Keep your own score in the top right cornerNamesScore

If the volume of a confined gas is tripled while the temperature remains constant, what change (if any) would be observed in the pressure?

The pressure would be reduced by a factor of 3, or cut in one-third.14

If I have 6.0 liters of gas in a piston at a pressure of 2.5 atm and compress the gas until its volume is 3.7 L, what will the new pressure, in mmHg, inside the piston be? 3,081.0 mmHg19

What is the pressure and temperature at STP?

1 atm and 0 degrees C24

If I have an unknown quantity of gas at a pressure of 1.2 atm, a volume of 31 liters, and a temperature of 87 0C, how many moles of gas do I have? 1.50 moles29

Define absolute zero.

10Absolute zero is the theoretical lowers possible temp, at 0 Kelvin or -273 degrees Celsius

A gas is a rigid container has its temperature cut in half, what change (if any) would be observed in the pressure?

Its pressure would also be cut in half.15

The air in a dry, sealed 2.3 L soda bottle is at STP. What will be its pressure if it is brought to a higher altitude where the temperature is only 23C? 1.08 atm20Insert Text for Question

What temperature, in OC and K, is absolute zero?

O K, -273 degrees C25

7.7 grams of C2H2 gas are at a pressure of 0.09 atm and at a temperature of 56 0C, what is the volume of the container that the gas is in? 96.3 L30

When a cold tire is inflated to a certain pressure and then is warmed up due to friction with the road, the pressure increases.

This happens because.

This happens because as the temperature increases, the motion of the molecules increases which causes more collisions and increases pressure.11

A gas is a flexible container, such as a balloon, has its temperature doubled from 100 K to 200 K, what change (if any) would be observed in the volume?

Its volume would double.16

A sample of gas at 3.00 x 102 mm Hg inside a steel tank is cooled from 400.0 C to 273 K. What is the final pressure of the gas in the steel tank, in atm?

0.16 atm22The nucleus has a _____ mass,a ____ volume, and is therefore _____.

If I have 43 liters of helium in a balloon at 250 C and increase the temperature of the balloon to 580 C, what will the new volume, in milliliters, of the balloon be?

47,761.7 mL26

An unknown quantity of CO, carbon monoxide gas, at a pressure of 770 mmHg occupies a volume of 32.0 L, and a temperature of 87 0C, how many grams of gas do I have?

30.6 grams31

At the temperature of absolute zero, what would the estimated pressure be, in atm?0 atm12

A 1.2 L balloon, which will pop if it has a volume greater than 2.0 L, starts at conditions of STP. It rises high into the sky so that the gas inside the balloon reaches temperature of -20 OC and .5 atm. Will the balloon explode?

Yes, the balloon will explode because it would reach a volume of 2.24 L17

The pressure of a gas is 730 mmHg when its volume is 200.0 mL. Calculate the pressure (in atm) if the gas is allowed to expand to 0.6 L at a constant temperature.Alkaline Earth MetalsLRTopBottom

0.32 atm21

A student finds an unknown quantity of F2 gas at a pressure of 785 mmHg, a volume of 32 L and a temperature of 87 0C. How many moles of fluorine gas do did this student have?

1.1 moles27

102.0 grams of Chlorine gas, Cl2, in a container with a volume of 6000 milliliters and at a temperature of 127 OC, what is the pressure inside the container?

7.8 grams32Final JeopardyWhat volume of H2O, collected at 25.0C and 0.8 atm would be produced by the decomposition of 64.0 g O2? Hint: think stoichiometry and

2H2 + O2(s) 2H2OClosingUnit #4 Exam TOMORROW!

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