Gas Unit Flashcards
Boyle’s law?
P1V1=P2V2
Charles Law
V1/T1=V2/T2
Gay Lussac
P1T1=P2T2
Avogadro
V1/n1=V2/n2
Who invented the classical barometer?
Torricelli
How can atmospheric pressure be measured?
With a barometer
Explain the mercury barometer work?
The height of mercury indicated the pressure. Patm was measured in millimetres of Hg
The different atmospheric pressure units?
1 atm 760 mmHg 760 Torr 14.7 psi 101.3 kPa
How to measure trapped gas?
Manometer
Formula for reading manometer
Pgas = Patm +/- delta height
Combined Gas Law
P1V1/T1n1=P2V2/T2n2
STP
Ts=273.15K
Ps=1.00 atm
Ideal Gas Constant
0.0820
Ideal Gas Law
PV=nRT
Air’s mass?
1g in 1000 mL
How high can the atmosphere hold water?
10.34m
What device did Boyle use?
A J-shaped tube (manometer)
How does Cartesian diver work?
The pressure shrinks the volume of air in the diver… thus the diver gets heavier, denser, and sinks
Avogadro’s Hypothesis: ________
(1811)
At a constant temperature and pressure equal volumes of gas have the same number of particles, regardless of type
How did they come up with the mol number?
So that the atomic mass number is the same as the mass, in grams, of 1 mile of atoms of that element
Standard set
P: 1.00 atm
V: 22.4 L
T: 273.15K
n: 1 mol
STP stands for
Standard Temperature and Pressure
SATP stands for
Standard Ambient Temperature and Pressure
NTP stands
Normal Temperature and Pressure
The law that states that at a constant volume, the pressure of a fixed mass of any gas is directlyproportional to its Kelvin temperature is…
Boyles laws
How is ‘absolute zero’ defined in chemistry, and what is its significance regarding gases?
When there is absolutely no Kinetic energy present. Any gas at this temperature would have zerovolume if it remained a gas
Who was the first scientist to use the scientific process to find the relationships between the variables of a gas?
Robert Boyle
Boyle’s Law states that:
The pressure exerted by a given mass of a gas at constant temperature is inversely proportional to the volume occupied by the gas
What is the molar volume of a gas at STP?
22.4 L
How many particles are there in one mole?
6.02 x 10^23 particles
Why is the mole so important in chemistry?
The mole was created by Amades Avogadro. It is a counting number, like pairs, dozens, or reams. It is a very large counting number to count particles. It’s value is 6.02x10^23. The number was chosen so that an element’s atomic mass would be the same as its mass in g/mol.
