test 8 Flashcards
1
Q
- Variation in pressure in the earth’s atmosphere creates wind, and changes in pressure that help us to predict:
A
- weather
2
Q
- There are four basic properties of a gas sample: pressure (P), Volume (V), Temperature (T), and:
A
- amount in moles (N)
3
Q
- Human beings can survive for weeks without food, and days without water, but only ____ without air.
A
- Minutes
4
Q
- The average distance that a molecule in a jar travels between collisions is called:
A
- Mean free path
5
Q
- Fortunately, we live at the bottom of a vast ocean of air, held together by Earth by:
A
- Gravity
6
Q
- The instrument used to measure atmospheric pressure is called:
A
- Barometer
7
Q
- The process by which gas molecules spread out in response to concentration gradient is called:
A
- Diffusion
8
Q
- When the desired product of a chemical reaction is a gas, the gas is often collected by the _______ of water.
A
- Displacement
9
Q
- According to Charle’s Law, when the air is heated, its volume increases, resulting in a lower ______
A
Density= m/v
10
Q
MATCH: This law states that for a constant number of particles at constant pressure, the volume of gas is proportional to its pressure.
A
(cc) Charle’s Law
11
Q
. MATCH: This law states that the total pressure of a gas mixture is the sum of its partial components.
A
(PP)Dalton’s law
12
Q
MATCH: This law states that at a constant temperature, the volume of a gas is proportional to the number of particles.
A
(CTP) Avogadro’s law
13
Q
MATCH: This law states that for a constant number of particles at constant temperature, the volume of gas is inversely proportional to its pressure.
A
(Inversely)Boyle’s law
14
Q
- The SI unit of pressure, defined as 1N/m^2 is called:
A
- Pascal
15
Q
FILL IN THE BLANK: #1
We can use the ideal gas law in combination with mass measurements to calculate the molar mass of a ________.
A
Unkown gas
