Compare gases and liquids in terms of compressibility
What is: gases are compressible whereas liquids are mostly not?
100
Boyles Law
What is P1V1=P2V2?
100
Daily Double!!
The absolute temperature of a gas is the measure of the:
What is average kinetic energy of its molecules?
100
The ideal gas equation
What is PV=nRT?
100
1atm = _____mmHg =_____kPa = ____torr
What is 760, 101.325, 760?
200
Names of the 7 diatomic gases
What are Bromine, Iodine, Nitrogen, Chlorine, Hydrogen, Oxygen, Fluorine?
200
Pouring liquid nitrogen (dry ice) over a balloon causes this to happen
What is a decrease in volume? (Charles' Law; V1/T1=V2/T2)
200
State Graham's Law
What is r1/r2 = √ (M2/M1) ?
r= rate of effusion
M= molar mass (pretend it's cursivey)
200
State R and units (gas constant)
What is 0.0821 atm•L/mol•K
200
Which gas diffuses faster at the same pressure and temperature: CO2 or CO?
What is CO?
300
A substance that usually exists as a liquid or solid is called this when in a gaseous state.
What is a vapor?
300
Use Gay-Lussac's law to find the pressure in gas X at a temperature of 100K?
(at 5K, pressure = 20atm)
What is 400atm?
(P1/T1=P2/T2; 20/5=400/100)
300
The type of collisions gas particles have with each other
What is elastic? (no energy of motion lost)
300
STP: what it means and what it is
What is Standard Temperature and Pressure: 273 K and 1atm? (A gas at STP occupies 22.4L volume)
300
A mixture containing 0.538mol He, 0.315mol Ne, and 0.103mol Ar, is confined in a 7L vessel at 25°C. Find the total pressure.
What is 3.34atm?
PV=nRT
P=(.538 + .315 + .103)(.0821)(298) /7
P=3.34atm
400
Two gases together make this type of mixture regardless of their identities.
What is a homogeneous mixture?
400
State Avogadro's Law
What is V = k n (Volume = constant x number of moles)
400
Explain how Boyles' Law works in terms of the Kinetic-Molecular Theory
What is: an increase in volume causes particles to travel a longer distance between collisions; therefore there are fewer collisions, which causes pressure to decrease ?
400
If 1.57mol has a pressure of 0.86atm at a temperature of -12°C, find the volume.
What is 39L?
V=nRT/P
V=(1.57)(0.0821)(261)/.86
V=39.1L
400
A gaseous mixture is made from 6.00g O2 and 9.00g CH4 and placed in a 15.0L vessel at 0°C. Find the partial pressures of each gas
Which one of these is commonly found as a gas:
NH4, NO2, KCl, or BaSO3
What is NO2?
500
A balloon has a volume of 1.5L at a temperature of 298K. If you take it outside to -15°C, find the volume, in mL
What is 1300mL?
V/T=V/T
1.5/298=V/258
1.2987L * 1000mL=1299
500
Place the following gases in order of increasing average molecular speed at 27 degrees C:
CO2, HF, F2, H2, Xe
What is:
Xe, CO2, F2, HF, H2
500
In an experiment, male cockraoaches were made to run at different speeds on a miniature treadmill while their oxygen consumption was measured. In one hour, the average cockroach running at 0.08km/hr consumed 0.8mL of O2 at 1atm pressure and 24°C per gram of insect weight. Find the number of moles of O2 consumed in one hour by a 5.2g cockroach.
What is 2*10^-4 mol?
PV=nRT
(1)(.0008)=n(.0821)(297)
n=3.2*10^-5 multiplied by 5.2g = 1.7*10^-4mol, round to one sig fig
500
A sample of KClO3 decomposes to produce O2 gas. The volume of gas is 0.250L at 26°C and 740 torr partial pressure. Find the number of moles of O2 collected
What is
9.92x10^-3 mol O2
n(O2) = PV/RT =
( (740torr)(1atm/760 torr) (0.250L) ) /
(0.0821)(299K)
= 9.92x10^-3 mol O2