Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

N.at.5 Ph.ys.ics > Properties Of Matter- The Kinetic Model Of A Gas > Flashcards

Properties Of Matter- The Kinetic Model Of A Gas Flashcards

1
Q

How is Pressure caused?

A

Inside a gas, the particles move randomly at high speeds making collisions with the walls of container.

This exerts a force on the walls which causes pressure

(Pressure = Force / Area)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is Temperature a measure of inside the gas

A

Temperature is a measure of the average kinetic energy of the particles. If a gas gets hotter, the particles speed up because they have more kinetic energy.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Volume

A

The volume of a gas is the same as the volume of a container. We assume the particles themselves are tiny compared to the container.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Atmospheric air pressure

A

The accepted value is 100,000Pa.

(1.0×10⁵Pa)

Air pressure decreases at altitude.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Pressure & volume

Fixed temperature

A

As volume decreases, the pressure in a gas increases because the particles would hit the container walls more often in a given time.

This would cause the force on the walls to increase and increase pressure.

We say that pressure and volume are inversely proportional.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Pressure & temperature

Fixed volume

A

As the temperature increases, the pressure increases because the particles would have more kinetic energy. This means the particles would faster and make collisions with the wall containers faster and harder so the force on the walls would increase and so would pressure.

We say pressure and temperature of a gas are directly proportional.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Volume & temperature

Fixed pressure

A

As the temperature of a gas increases, the volume of the gas increases because the particles move faster and strike the walls harder and more often.

We say that temperature and volume in a gas are directly proportional.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Gas law 1 - pressure & volume formula

A

pV = constant

p1V1=p2V2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Gas law 2 - pressure & temperature formula

A

p1 = p2

T1 T2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Gas law 3 - volume & temperature formula

A

V1 = V2
T1 T2

Temperature must be in Kelvin (K)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Gas law 4 - combined gas equation formula

A

p1V1 = p2V2
T1 T2

Temperature must be in kelvin (K)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the temperature of a gas a measure of?

A

The temperature of a gas is a measure of the average kinetic energy of the gas particles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the relationship between pressure and temperature of a gas?

A

Directly proportional, if the temperature is is kelvin (K)

P/T = constant 
P1/T1 = P2/T2

The temperature must be in kelvin.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the relationship between pressure and volume of a gas?

A

Inversely proportional (fixed temp)

pV = constant 
p1V1 = p2V2
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the relationship between volume and temperature in a gas?

A

Volume is directly proportional to temperature as long as the temperature is in KELVIN (K).

V/T = constant 
V1/T1 = V2/T2

TEMPERATURE MUST BE IN KELVIN.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Pressure

A

Inside a gas the particles move randomly at high speeds (e.g. 500m/s) making collisions with the walls of the container. This exerts a force on the walls which causes pressure.

Pressure is the force per unit area acting on a surface.
Measured in Nm-².

17
Q

Pascal and newtons relationship

A

One pascal equals one newton per metre squared

1Pa = 1Nm-²

18
Q

Pressure formula

A

P = F/A

P = pressure (Pa)
F = force (N)
A = area (m²)
19
Q

What does the kinetic model of gas consider/ assume? (Pressure)

A

The kinetic model of gas considers the particles to move randomly at high speeds colliding with the walls of the container and this causes gas pressure.

20
Q

What does the kinetic model of gas consider/ assume? (Temperature)

A

The kinetic model of gas consider the temperature of a gas to be a measure of the average kinetic energy of the particles as they move at high speeds.

21
Q

What does the kinetic model of gas consider/ assume? (Volume)

A

The kinetic model of gas consider the volume of a gas to be the volume of the container.

22
Q

Temperature

A

Temperature is a measure of the average kinetic energy of the particles. If the gas gets hotter, the particles speed up (because they have more kinetic energy).

23
Q

Kelvin (k) and °C

A

Ok = -273°C

°C to k: add 273
k to °C: subtract 273

24
Q

Combined gas equation

A

When the temperature, volume and pressure of a gas are all changing we must use the combined gas equation.

p1V1/T1 = p2V2/T2

TEMPERATURE MUST BE IN KELVIN.

25
Q

What is absolute zero?

A

Ok (-273°C)

The pressure and volume of an ideal gas would be zero at this temperature as the particles have no kinetic energy.

N.at.5 Ph.ys.ics (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions