Heat capacity heating_curves

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Heat and heat capacity. 3r ESO - Physics and chemistry -IES Cap de Llevant - Maó - Menorca

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Heat capacity heating_curves

  1. 1. SAME VOLUMES OF WATER AND OIL ARE HEATED WITH SAME “BURNERS”WE RECORD THE TEMPERATURE OF THE SUBSTANCE EACH 30 SECONDS DRAWING ON A SAME GRAPH HOW TEMPERATURES VARY …
  2. 2. SUBSTANCES RECEIVE THE SAME AMOUNT OF HEAT BECAUSE THEY ARE HEATED WITH THE SAME BURNER THEIR RESPONSE TO THE ABSORTION OF HEAT IS DIFFERENT. WHY?
  3. 3. BECAUSE THEY AREDIFFERENT SUBSTANCES WITH DIFFERENT PROPERTIES.
  4. 4. WHICH SUBSTANCE HEATS FASTER? (REMEMBER THEY ABSORB THE SAME AMOUNT OF HEAT PER SECOND)
  5. 5. AFTER 800 SECONDS ONE SUBSTANCE IS AT 52ºC WHILE THE OTHER IS AT 84ºC 84ºC 52ºC
  6. 6. WHICH ONE CHANGES ITS TEMPERATUREFASTER? THE “BLUE” OR THE “RED” ONE? WHY?
  7. 7. FOR SAME VALUES OF TIME (AND HAVING ABSORBED THE SAME AMOUNT OF HEAT)ONE SUBSTANCE (THE RED ONE) IS ALWAYS AT A HIGHER TEMPERATURE
  8. 8. BEING DIFFERENT SUBSTANCES THEY HAVE DIFFERENT PROPERTIES.HEAT CAPACITY: IS A PROPERTY OF SUBSTANCESTHAT MEASURES THE ABSORTION OF HEAT ANDTHE CONSEQUENT INCREASE OF TEMPERATURE.DIFFERENT SUBSTANCES WILL HAVE DIFFERENT HEAT CAPACITIES.DEFINITION: HEAT CAPACITY IS THE AMOUNT OF HEAT REQUIRED FOR A CERTAIN AMOUNT OFSUBSTANCE TO CHANGE ITS TEMPERATURE 1º C
  9. 9. WATER HEAT CAPACITY IS BIGGER THAN OIL HEAT CAPACITY WHAT DOES THAT MEAN?
  10. 10. WATER ABSORBS HEAT WITHOUTCHANGING ITS TEMPERATURE AS MUCH AS OIL DOES Water Heat capacity: 4,18 Joules / gram ºC Oil Heat capacity: 2 Joules / gram ºC
  11. 11. WICH LINE IS FOR WATER? OIL WATER
  12. 12. HOW IS THE ABSORTION OF HEAT RELATED TO THE TEMPERATURE?
  13. 13. What do the particles of a substance do when the substance absorbs heat? MOVE (OR VIBRATE) FASTER
  14. 14. Increasing the particle movent will mean?
  15. 15. States of matterHeating curves Changes of phase

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