solids, liquids & gases

Question 1

what are the SI units for temperature?

Answer 1

Celsius (°C) or Kelvin (K)

Question 2

what are the SI units for force?

Answer 2

Newtons (N)

Question 3

what are the SI units for mass?

Answer 3

kilograms (kg)

Question 4

what are the SI units for density?

Answer 4

kilograms per metres cubed (kg/m3)

Question 5

what are the SI units for pressure?

Answer 5

Pascals (Pa)

Question 6

density=?

Answer 6

mass ÷ volume

Question 7

volume=?

Answer 7

width x length x height

Question 8

static pressure=?

Answer 8

force ÷ area

Question 9

pressure (at different depths)=?

Answer 9

height x density x gravitational field strength

Question 10

what do particles in a solid look like?

Answer 10

tightly packed and vibrating around a fixed point but in a regular pattern

Question 11

what do particles in a liquid look like?

Answer 11

touching but moving independently past each other

Question 12

what do particles in a gas look like?

Answer 12

move in completely independent rapid, random movements

Question 13

what is 1 °C in Kelvin?

Answer 13

-273K

Question 14

what is 0K called?

Answer 14

absolute zero

Question 15

what are the SI units for specific heat capacity?

Answer 15

joules per kg Celsius (J/kg°C)

Question 16

doubling the temperature…

Answer 16

doubles the pressure

Question 17

halving the volume…

Answer 17

doubles the pressure

Question 18

if the temperature increases in a container… the pressure increases as…

Answer 18

the particles move faster and collide with more force and more frequently on the walls of the container

Question 19

as the particles exert a force on the container..

Answer 19

they exert a pressure as p=F÷a

Question 20

when particles collide with the wall of a container…

Answer 20

they exert a force

Question 21

change in thermal energy=?

Answer 21

mass x specific heat capacity x change in temp

Question 22

what is specific heat capacity?

Answer 22

the amount of heat energy required to raise the temperature of 1kg of given substance by 1°C

Question 23

describe a specific heat capacity experiment

Answer 23

set up a circuit including a voltmeter, ammeter, aluminium block (with a heater and thermometer) and power source. measure the mass of block and measure the starting temperature. then measure the time taken for the temperature to rise by about 20°C. measure the voltage and current and then work out energy supplied by current x voltage x time. use the specific heat capacity equation and work it out.

Question 24

describe an experiment to show that temperature remains constant during a change of state

Answer 24

get some stearic acid and heat it up and then let it cool. stick a thermometer in it and measure the temperature every minute- you should notice that around 13 mins the temperature stays constant

Question 25

absolute temperature=

Answer 25

0K or -273°C

Question 26

pressure at a point, in a liquid or gas acts…

Answer 26

equally in all directions