Heat & The Gas Laws S4 Physics - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

1. What is the difference between Heat and Temperature? answer Heat is a form of energy, temperature is a measure of how hot or cold something is.

2. Heat is measured in …. answer Joules

3. Temperature can be measured in ………. answer Celcius (ºC) Kelvin (K)

4. How can heat loss from the home be reduced? answer Insulation location Type of heat loss Loft insulation Roof space convection Cavity wall Between walls conduction Silver foil Behind walls, radiators radiation Insulation location Type of heat loss Roof space convection Cavity wall conduction Silver foil Behind walls, radiators

5. What is meant by the term specific heat capacity? answer The amount of heat energy required to change the temperature of 1kg of a substance by 1ºC.

6. What does the symbol ∆ stand for in the equation Eh = cm∆T? answer “Change in” (temperature).

7. What does the term “specific latent heat of fusion” mean. answer The amount of heat energy required to change 1kg of a substance from solid to liquid

8. How much heat energy is needed to heat 2kg of water from 20ºC to boiling point? (c = 4180 J/kg ºC) answer Eh = cm∆T = 4180 X 2 X 80 =668800J

A force that acts on an area. 9. What is a pressure? answer A force that acts on an area.

What are the units of pressure? answer Pascals (Pa) or N/m2

11. How many cm2 are there in 1m2 answer 10,000 (100 x 100)

12. What causes gas pressure? answer The particles colliding with the walls of the container

13. What is meant by the term “Kinetic Theory”. answer The theory that gases are made of particles that are moving randomly in all directions

Pressure increases as volume decreases. 14. What happens to the pressure in a syringe when you push the plunger in? answer Pressure increases as volume decreases.

Pressure increases as temperature increases 15. What happens to pressure in a aerosol can when it is thrown on a bonfire. answer Pressure increases as temperature increases

16. What temperature in ºC is absolute zero? answer -273 ºC

17. What is 20 ºC in Kelvin? answer 293K

18. What happens to the pressure in a car tyre after a motorway drive? answer Pressure increases as temperature has increased

19. What is pressure measured with? answer A pressure gauge or Bourdon Gauge

20. What is the combined gas law equation? answer