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Learn about the distinction between heat and temperature, how to measure them, and their applications in the gas laws. Explore ways to reduce heat loss in homes and discover the specific heat capacity concept. Also, grasp the significance of symbols like ∆ and specific latent heat of fusion. Calculate heat energy requirements and understand pressure, its units, causes, and measurement methods. Find answers to various physics questions related to heat, temperature, and gas laws.
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Heat & The Gas Laws S4 Physics - 1 2 3 4 5 6 7 10 11 12 13 14 8 9 15 16 17 18 19 20
answer 1. What is the difference between Heat and Temperature? Heat is a form of energy, temperature is a measure of how hot or cold something is.
answer 2. Heat is measured in …. Joules
answer 3. Temperature can be measured in ………. • Celcius (ºC) • Kelvin (K)
answer 4. How can heat loss from the home be reduced?
answer 5. What is meant by the term specific heat capacity? The amount of heat energy required to change the temperature of 1kg of a substance by 1ºC.
answer 6. What does the symbol ∆ stand for in the equation Eh = cm∆T? “Change in” (temperature).
answer 7. What does the term “specific latent heat of fusion” mean. • The amount of heat energy required to change 1kg of a substance from solid to liquid
answer 8. How much heat energy is needed to heat 2kg of water from 20ºC to boiling point? (c = 4180 J/kg ºC) • Eh = cm∆T • = 4180 X 2 X 80 • =668800J
answer 9. What is a pressure? A force that acts on an area.
answer What are the units of pressure? Pascals (Pa) or N/m2
answer 11. How many cm2 are there in 1m2 10,000 (100 x 100)
answer 12. What causes gas pressure? The particles colliding with the walls of the container
answer 13. What is meant by the term “Kinetic Theory”. The theory that gases are made of particles that are moving randomly in all directions
answer 14. What happens to the pressure in a syringe when you push the plunger in? Pressure increases as volume decreases.
answer 15. What happens to pressure in a aerosol can when it is thrown on a bonfire. Pressure increases as temperature increases
answer 16. What temperature in ºC is absolute zero? -273 ºC
answer 17. What is 20 ºC in Kelvin? 293K
answer 18. What happens to the pressure in a car tyre after a motorway drive? Pressure increases as temperature has increased
answer 19. What is pressure measured with? A pressure gauge or Bourdon Gauge
answer 20. What is the combined gas law equation?
