Chapter 8 Gases Flashcards
A manometer measures
The pressure exerted by a gas in a closed container
What is delta H when talking about a manometer
It is the difference between the 2 different sides of mercury.
What are the 2 values used in a manometer.
The atmospheric pressure and the pressure of the gas.
If the contained gas pressure is more than the atmospheric pressure what equation do we use?
Pressure of the gas = (pressure of the atmosphere) - (delta h)
Is the atmospheric pressure is greater than the pressure of the exerted gas, we use the equation
(Pressure of gas)= (atmospheric pressure) + (delta H)
A barometer is used to measure
Barometric pressure
What is the pressure of the gas inside the manometer if the atmospheric pressure is 300 mmHg and the Mercury is 100 mmHg higher on the side of the manometer?
The pressure is 200
because you subtract the atmospheric pressure by delta h
What is the pressure of the gas inside the manometer if the atmospheric pressure is 300 mmHg and the Mercury is 100 mmHg higher on the side of the open end ?
The pressure is 400 mmHg
You add the pressure of the atmosphere to the delta h
1 Atm is how many mmHg?
760
1 Atm is how many torr?
760
1 Atm is how many psi?
14.7
1 Atm is how many kPa?
101.3
1 Atm is how many bar?
1.01
Volume and pressure are _______ related
Inversely
Pressure is _______ related to temperature
Directly
Volume is _______ related to temperature
Directly
If volume goes up, temperature
Also goes up, because pressure must remain constant
What is the combined gas law?
P1V1/t1 =P2V2/T2
How/when do I use the combined gas law
You ignore the constant. And plug in the values.
You use it when pvnrt is not required
What is STP
Standard temperature and pressure, aka 273° K and 1 atm
PV=nRT
P=
The pressure of the gas
PV=nRT
V =
The volume of the gas in liters
PV=nRT
n=
The number of moles of gas
PV=nRT
R=
The ideal gas constant relative to the units used/desired for pressure
PV=nRT
T=
Temperature in Kelvin
R value for atm
.0821
R value for kPa
8.314
R value for torr/mmHg
62.36
R value for psi?
1.21
What is Dalton’s law of partial pressure
The total pressure of gasses is equal to the sum of the partial pressures of the component gasses
If the total pressure of NaCl is 300 mmHg and you know the pressure of the Na is 100 mmHg, what is the pressure of the Cl
200mmHg
The smaller the molecules molar mass is, the ______ it moves
Faster
How do temperature and average speed of particles work?
They are theoretically the same, so a higher temperature will make the particles move faster
How to tell if a container has a smaller number of moles of a gas than another?
Whichever has the smallest pressure relative to the highest pressure
How to tell which between 2 flasks which one has the greatest density.
Look for the one with the largest pressure
If 2 liters of a gas at 1 atmosphere is compressed into a 1 liter tank, what is the new pressure?
It is double the original, so 2 ATMs
Hydrogen gas is collected over water at 24° Celsius. The total pressure of the sample is 755mmHg. The vapor pressure of the water is 22 mmHg, what is the partial pressure of hydrogen gas?
755-22= 733mmHg
Under which conditions will a gas deviate most from its ideal behavior
High pressure and low temperature. They will be moving super slow and there will be tons of collisions due to the high pressure
What happens if Pinocchio says “my nose will grow now”😈
So imagine this… Pinocchio’s nose grows only when he tells a lie right? if he said this. “My nose will grow now” it clearly won’t happen because he didn’t lie… but because his nose doesn’t grow, his statement becomes a lie, and his nose will grow. Now that his nose grew, his earlier statement becomes true, so his nose wouldn’t have grown. This will go on an infinite number of times. Does his nose grow?
