P1.3.1 - Gas Pressure and Temperature Flashcards
If the temperature of a gas increases, what would happen to the speed of the gas particles?
They will increase
If the temperature of a gas decreases, what would happen to the speed of the gas particles?
They will decrease
What determines the amount of gas pressure?
The amount of collisions of gas particles
How do the collisions of gas particles create gas pressure?
A collision of gas particles creates a very small force. If there are many collisions occurring, this creates a a larger outward force over a certain area - this is gas pressure
Why does gas pressure increase when the temperature does?
Because temperature increases the average speed of gas particles, increasing the likelihood of collisions and therefore increasing the gas pressure
What can you use to measure the pressure of air that is trapped in a bottle?
A pressure gauge or a manometer to measure the pressure of a PE
What is pressure measured in?
Pascals (pa)
How many newtons per square meter is equal to one pascal?
1N/m squared
How many pascals are in a kilopascal?
1000pa = 1kpa
What is absolute zero?
0K / -273.14 degrees Celsius
Is it possible to reach absolute zero temperature?
No
How do you find out the gas pressure of absolute zero?
You use a graph and extrapolate
What would the gas pressure be at absolute zero?
0Pa
What is extrapolation?
An estimated value deduced using a graph
