Gas temperature + pressure / volume- SP14 Flashcards
the faster the average speed of the particles in a gas….?
the higher the temperature
what is the temperature of a gas a measure of?
average kintetic energy of the paticles in the gas
what is the pressure of a gas due to?
forces on the walls of a container caused by the moving particles hitting the walls
when particles are faster moving…?
more frequent collisions and more forces they will exert when they collide
for a fixed mass of gas in a fixed volume, what increases, why?
pressure - due to temperature increases
what is the unit for pressure?
pascals
what is the symbol for pascals?
(Pa)
1Pa =?
1N/m2
what temperature is ‘absolute zero’?
273C
why is absolute zero called that?
because if a gas could be made that cold, it’s pressure would be zero and the particles would not be moving
what measured temperatures relative to absolute zero?
kelvin temperature scale
what does the kelvin temperature scale measure?
temperatures relative to absolute zero
what is the unit for kelvin temp scale? (+ symbol)
Klevin - K
what is 1K the same temp interval as?
1C
what is absolute zero in Ks?
0K
What is needed to convert from kelvin into degrees celsius?
subtract 273
what is needed to convert from dregrees celsius into kelvin
add 273
what is the average kinetic energu of particles in a gas directly proportional to?
kelvin temperature of gas
what is the effect of gas particles hitting a surface?
overall force on the surface acting at right angles to the surface - detecting as gas pressure
what happens when the same number of particles at the same temp is put into a smaller environment?
the particles collide more often and so hit the walls more often - increasing force on walls and so gas pressure
what is the equation for volume and pressure of a fixed mass of gas at a constant pressure?
P1 x V1 = P2 x V2
what does P1 x V1 = P2 x V2 mean?
starting pressure x starting volume = final pressure x final volume
why does a bicycle pump get warm when used?
as piston of pump moves, speed of particles increases when they bounce off. average speed inside pump increases - increase in temperature detected
