Gasses Flashcards
How are the particles in a gas arranged?
They are widely spread out.
Do gasses have mass?
Yes. Particles have mass; therefore, gas must have mass. This can be proven by weighing a balloon once it is deflated and inflated.
Can gasses be compressed?
Yes. If a syringe is plugged at the bottom but pushed, a gap will remain as the gas is still there — just very compressed. They can compress because of the space between particles.
Can gasses diffuse?
Yes, very easily. The particles of two gasses will collide and begin to diffuse, spreading from an area of high concentration to one of low concentration.
What are some properties of carbon dioxide?
Colourless,
Odourless,
Denser than air/oxygen.
How can carbon dioxide be tested for?
Bubble the gas sample through colourless limewater. It will turn milky/cloudy white if CO2 is present.
What are some properties of oxygen?
Colourless.
Odourless.
~Same density as air.
How can oxygen be tested for?
It will relight a ‘glowing’ splint that has just gone out. This is because the other two components of the fire triangle (heat + fuel) are present.
What are some properties of hydrogen?
Colourless.
Odourless.
Rarer (less dense) than oxygen/air.
How is hydrogen tested for?
The ‘squeaky pop’ test. A lit splint will make a ‘pop’ sound in a hydrogen sample.
How percentage of air is nitrogen?
78%.
What percentage of air is oxygen?
21%
What percentage of air is argon?
0.93%
What percentage of air is neon?
<1% (0.0018%).
What percentage of air is carbon dioxide?
<1% (0.03 recurring %).