What is a mole fraction?

One substance in ratio to other substance

When mass of gas changes ...

P and V change in predictible pattern

What does Avogadro's Law state?

At given T/P/V, all molecules have same amounts

What does Charles' Law tell us?

Increased temperature → Increased volume

\frac{P_1\times V_1}{T_1}=\frac{P_2\times V_2}{T_2} tells us...

Pressure, Volume, and Temperature are proportional

What does Boyle's Law tell us?

Increased pressure → Decreased volume

What is not true about the Kinetic-Molecular Theory?

Molecules move rapidly at same speeds in different directions

How fast a gas will leave a container from a small leak

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Section 2 - Gases

21 termsStudBud Administration16 plays

AcaDeca 2023 Science (pgs 32-41)

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Questions 21

Answers

1
What is a mole fraction?
6.022 * 10^23
Taking the mole of one substance and dividing it by # of substances
Mass of substance in one mole
One substance in ratio to other substance
2
In the non-ideal gas equation, what two variables, when smaller, cause a gas to become closer to ideal?
Variables a and b
Variables x and y
Gases cannot be closer to ideal
Variables R and b
3
Who developed the first hydrogen-powered balloon?
Antoine Lavoisier
French guy
Carl Wilhelm Scheele
Jacques Charles
4
When mass of gas changes ...
Molecules increase energy
V doubles
P and V change in predictible pattern
P and T change in predictible pattern
5
Given same temperatures, smaller molecules...
Will be detected last
Will be detected first
Will be slow
Will have a tendency to stray
6
The relative speed of gas molecules (u) are proportional to the root of molar mass (M)
False
True
7
Who determined Avogadro's Number?
Jean Baptiste Perrin
Amedeo Avogadro
Antoine Lavoisier
Joseph Priestley
8
Water vapor pressure is proportional to temperature of water.
True
False
9
What does Avogadro's Law state?
Speed of isolated molecule determines energy amount
Total Mass : Individual Gas Mass
At given T/P/V, all molecules have same amounts
Many gases = two identical molecules bonded together
10
Which are good liquifying gases (3 answers)?
NH_3
CO_2
N_2
CFCs
11
What does Charles' Law tell us?
Increased temperature → Increased volume
Increased pressure → Decreased volume
Increased pressure → Increased temperature
Increased pressure → Increased volume
12
\frac{P_1\times V_1}{T_1}=\frac{P_2\times V_2}{T_2} tells us...
Pressure, Volume, and Temperature are inversely proportional
A decreased temperature leads to an increased volume
*the correct answer that we definitely know but can't explain*
Pressure, Volume, and Temperature are proportional
13
What element is a mole based on?
!2 Carbon
1 Hydrogen
96 Molybdenum
13 Carbon
14
What does Boyle's Law tell us?
Increased pressure → Increased volume
Increased pressure → Increased temperature
Increased temperature → Increased volume
Increased pressure → Decreased volume
15
What is not true about the Kinetic-Molecular Theory?
During collisions, there is no energy loss
Molecules do not interact with each other
Pure gas has a negligible volume
Molecules move rapidly at same speeds in different directions
16
Who first discovered and identified oxygen?
Carl Wilhelm Scheele
Antoine Lavoisier
Johannes van der Waals
Joseph Priestley
17
What is the ideal gas law?
P=\frac{mu^2}{l}
P=\frac{nRT}{V-nb}-\frac{n^2a}{V^2}
PV=nRT
PV=Nmu^2
18
What did Scheele call oxygen O2?
Blow-stuff-up-like-in-Fast-and-Furious gas
Fire-air
Combustion gas
Oxygene
19
What is effusion?
How fast a solid will leave a conainer from a small leak
Diffusion, but using active transport
How fast a gas will leave a container from a small leak
Effusing gas into a mixture to monitor changes within intermolecular bonds
20
What is the value of absolute zero temperature (2 answers)?
212° F
-273° C
0 K
-100° C
21
What is the hydrogen-balloon referred to as?
Charlière
Avocado balloon
Hydrogène d'balon
Français d'name

Section 2 - Gases Flashcards | StudBud