# unit 3 chem107

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1. what happens to motion at 0 kelvin?
all motion stops
2. pressure =?
force/area
3. device used to measure atmospheric pressure
barometer
4. STP =
0 degrees C
5. the force per unit area on a surface
pressure
6. convert Celsius to kelvin?
C+273
7. boyles law?
pressure and volume
8. Charles law?
volume and temperature
9. gay lussacs law?
pressure and temperature
10. combined gas law?
pressure, volume and temperature
11. formula for gas laws?
P1V1/T1 = P2V2/T2
12. the pressure of each gas in a mixture is called?
the partial pressure of gas
13. daltons law of partial pressure?
P(T) = P1 +P2 + P3 +P4 +....
14. what does daltons law of partial pressure state?
that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases
15. volume directly proportional to the number of gas molecules
v1/n1 = v2/n2
17. n is calculated in?
moles
18. ideal gas law formula?
PV=nRT
19. P?
pressure (atm)
20. V?
volume (L)
21. n?
moles
22. R?
ideal gas law constant- depends on the units used like pressure, volume, etc
23. T?
temperature in kelvins
24. R number?
R= .0821atmL/mol K
25. the volume occupied by one mole of a gas at STP is known as?
standard molar volume
26. STP?
22,4L/1 mol
27. 3 situations of STP?
• 1 atm
• O degrees C (273K)
• 1mol/22.4L
28. density?
molar mass (g) / 22.4L
29. the ratio of mass to volume?
density
30. ideal gas laws?
• no attractions between gas molecules
• gas molecules do not take up space
31. liquids are practically ____
incompressible
32. a measure of a liquid's resistance to flow
viscosity
33. ___ decreases with increased temperature
viscosity
34. a measure of the attractive forces exerted among molecules at the surface of a liquid
surface tension
35. surface tension results in?