Properties of Matter

Question 1

can heat be transferred

Answer 1

heat can be transferred from a hot object to a cool object

Question 2

can temperature be transferred

Answer 2

no

Question 3

can energy be lost

Answer 3

no, energy is never lost, but it may be transformed

Question 4

why isnt all heat energy usually transferred

Answer 4

because it has been ‘lost to the surroundings’

Question 5

what is conduction

Answer 5

when 2 solid objects allow heat to conduct as vibrating atoms transfer kinetic energy

Question 6

what is convection

Answer 6

happens in fluids, when air is heated and atoms flow through a convection current

Question 7

what is radiation

Answer 7

when heat travels thriugh a vacuum

Question 8

what are the good conductors

Answer 8

metals- silver, copper, aluminium

Question 9

what are the good insulators

Answer 9

non-metals- mineral wool, glass, polystyrene

Question 10

what is specific heat capacity

Answer 10

the amount of heat energy needed to raise the temperature of 1kg of the substance 1°c

Question 11

what does Eh stand for

Answer 11

heat energy

Question 12

wha does c stand for

Answer 12

specific heat capacity

Question 13

what does ‘delta’T stand for

Answer 13

change in temperature °c

Question 14

what does m stand for

Answer 14

mass

Question 15

how do you convert °c to K

Answer 15

+273

Question 16

what is boyles law

Answer 16

P1V1=P2V2

Question 17

what is charles law

Answer 17

V1 = V2
T1 T2
Temp measured in kelvin

Question 18

what is gay-lussacs

Answer 18

P1 = P2
T1 T2

Question 19

what is the general gas law

Answer 19

P1V1 = P2V2
T1 T2

Question 20

which formula do you use for the flat part of the graph and what formula do you use for the increasing part

Answer 20

e=cm’delta’T
e=ml

Question 21

what is happening at the first flat point and what is happening at the second flat point

Answer 21

solid to liquid (fusion)
liquid to gas (vapourisation)

Question 22

what is pressure

Answer 22

the force per unit area

Question 23

what is the formula for pressure

Answer 23

P=F
A

Question 24

how do you convert cm to m

Answer 24

divide by 100

Question 25

how to convert mm to m

Answer 25

divide by 1000

Question 26

if the number of particles increase, what happens to the pressure

Answer 26

pressure increases because the total force acting on the walls each second increases and the area stays constant

Question 27

what are the 3 ways to increases pressure

Answer 27

increase number of particles
increase tempertaure
decrease volume