Gas Pressure And Temperature Flashcards
What causes gas pressure?
Gas pressure is caused by the random impact of gas molecules
What happens if you increase gas temperature?
The gas pressure increases
The molecules move faster
The number of impacts increase
How do we observe random motion?
Individual molecules are too small to see
Use smoke particles in the air
Use smoke cell and microscope
Smoke cells move haphazardly
The much smaller the air molecules randomly impact on the smoke particles
When a gas is heated in a sealed container, how does gas pressure change?
The gas pressure increases
How is the average separation of molecules changed?
It is changed by increasing the separation of the molecules
How does the number of impacts of molecules make on the surface of the container each second change and why?
The number of impacts increase because they hit the sides more often and more frequently
Explain why smoke particles in the air move about faster if the air temperature is increased?
They move about faster because they have more energy
A gas cylinder has a valve opening to let out gas if it becomes too hot. Explain how gas pressure changes if gas is too hot and valve is opened?
The gas pressure increases and the valve will open so gas pressure decreases
What is Brownian Motion?
The random motion of tiny particles in a fluid.
Robert Brown observed this in 1785 watching pollen grains on water move about haphazardly.
This was a puzzle until kinetic theory of matter provided an explanation
