Gas temperature + pressure / volume- SP14

Question 1

the faster the average speed of the particles in a gas….?

Answer 1

the higher the temperature

Question 1

what is the temperature of a gas a measure of?

Answer 1

average kintetic energy of the paticles in the gas

Question 2

what is the pressure of a gas due to?

Answer 2

forces on the walls of a container caused by the moving particles hitting the walls

Question 3

when particles are faster moving…?

Answer 3

more frequent collisions and more forces they will exert when they collide

Question 4

for a fixed mass of gas in a fixed volume, what increases, why?

Answer 4

pressure - due to temperature increases

Question 5

what is the unit for pressure?

Answer 5

pascals

Question 6

what is the symbol for pascals?

Answer 6

(Pa)

Question 7

1Pa =?

Answer 7

1N/m2

Question 8

what temperature is ‘absolute zero’?

Answer 8

273C

Question 9

why is absolute zero called that?

Answer 9

because if a gas could be made that cold, it’s pressure would be zero and the particles would not be moving

Question 10

what measured temperatures relative to absolute zero?

Answer 10

kelvin temperature scale

Question 11

what does the kelvin temperature scale measure?

Answer 11

temperatures relative to absolute zero

Question 12

what is the unit for kelvin temp scale? (+ symbol)

Answer 12

Klevin - K

Question 13

what is 1K the same temp interval as?

Answer 13

1C

Question 14

what is absolute zero in Ks?

Answer 14

0K

Question 15

What is needed to convert from kelvin into degrees celsius?

Answer 15

subtract 273

Question 16

what is needed to convert from dregrees celsius into kelvin

Answer 16

add 273

Question 17

what is the average kinetic energu of particles in a gas directly proportional to?

Answer 17

kelvin temperature of gas

Question 18

what is the effect of gas particles hitting a surface?

Answer 18

overall force on the surface acting at right angles to the surface - detecting as gas pressure

Question 19

what happens when the same number of particles at the same temp is put into a smaller environment?

Answer 19

the particles collide more often and so hit the walls more often - increasing force on walls and so gas pressure

Question 20

what is the equation for volume and pressure of a fixed mass of gas at a constant pressure?

Answer 20

P1 x V1 = P2 x V2

Question 21

what does P1 x V1 = P2 x V2 mean?

Answer 21

starting pressure x starting volume = final pressure x final volume

Question 22

why does a bicycle pump get warm when used?

Answer 22

as piston of pump moves, speed of particles increases when they bounce off. average speed inside pump increases - increase in temperature detected