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# LPH 105 W15 13.7-11

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## Richard Datwyler

on 6 July 2016

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#### Transcript of LPH 105 W15 13.7-11

Ideal gas law
Kinetic theory
PV=nRT
PV=NkT
If 62.5 L of oxygen at 18.0 C and an absolute pressure of 2.45 atm are compressed to 38.8 L and at the same time the temperature is raised to 56.0 C what will the new pressure be?
By what factor will the rms speed of a gas molecules increase if the temperature is increased from 20 C - 160 C?
If the rms speed of molecules in a gas at 20.0 C is to be increased by 5.0%, what temperature must it be raised to?
What is the rms speed of oxygen gas molecules contained in a 5.7 m^3 volume at 1.7 atm if the total amount of oxygen has a mass of 15.2 kg.
4.46 atm
1.22
50.0 C
440 m/s
Estimate the number of air molecules in a room of length 6.0 x 3.0 x 2.5 m. Assume the temperature is 22 C.
1.12 x 10^27
If P is proportional to T then is (P1/T1)=(P2/T2) an appropriate equation or is this incorrect, and why?
"When do we use Avogadro's number? When converting grams to moles?"
"Could you explain what a plasma is?"
"Is it safest to always convert to Kelvin?"
"so for the last problem on the quiz it had to be in Kelvin i was wondering if you could explain why? "
"I could use a little more rundown on pressure, volume and temperature. Ive done these things a bunch, but I always get the relationships of these things mixed up. is there any clever way to keep them straight?"
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