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Flashcards in chem gas laws test Deck (22):
1

Why do you use the first and last data points and not consecutive data points when finding a value based on info from a chart

Error gets magnified when you use consecutive data points.
The margin of error is reduced with the greater range. The first and last points represent a complete set of data.

2

What are the different values for pressure

1 atm= 14.7 psi= 760 torr= 760 mm Hg= 101300 Pa= 101.3 kPa

3

What are the different values for pressure

1 ml= 1 c^3, 1000 ml= IL

4

What must be true when using boyle's law regarding moles and temp?
Is this a direct or indirect relationship

They must be constant
They are indirect

5

What kind of relationship are charles and gay-lussac's law

Direct

6

What is the pressure at sea level?
What is absolute 0 pressure in kelvin
Psi=

1 atm
0 K
Pounds per square inch (tire pressure)

7

Ideal gas law means ________...

Looking at a sample of gas at one point in time

8

R=_________/_________

Ideal, universal gas constant (defines other units)

9

Molar mass unit:

G/mol

10

Dalton's law of partial pressures applies to _____

Mixtures

11

Total pressure of a gas mixture is equal to ___

The sum of individual gas pressures

12

In WET GAS= DRY GAS + WATER VAPOR, the variables must describe that certain gas in ____

n=PV/RT

13

The answer to a mole fraction is a decimal representing the ___ of the total number of ___________.

Percent, moles

14

the movement of a substance from HIGH to LOW

Diffusion

15

Movement of a substance from HIGH to LOW through a membrane (tiny openings)

Effusion

16

In Graham's law, make gas 1 the ____ gas

Lighter

17

In Graham's law, always remember that gases can be _______

Diatomic

18

What is Henry's law

The amount of gas that will dissolve in a liquid at a given temperature varies directly with the pressure above the liquid

19

Why do divers take precautions with solubility of gasses and temperature

As the temperature increases, the solubility of a gas decreases
So, they avoid taking hot showers so no gaseous bubbles form in the bloodstream inside the body

20

If a temperature increases by 15 Celsius, do you change the T or leave it C

Leave it

21

If you are trying to find something at STP, what do you use for your second equations

The constant for each variable
273 K, 1 atm, etc

22

Actual pressure=_________+_________

Gauge pressure, atmospheric pressure