| what is the specific heat capacity of a substance | the amount of energy required to raise the temp of 1kg of the substance by 1 degrees celsius |
| specific heat capacity equation | ⃤. E = m x c x. ⃤0
change in thermal energy= J
mass= kg
specific heat capacity= J/kg°C
change in temp= °C |
| calc | 246510 J |
| calc | 3 kg |
| outline all the steps to the specific heat capacity practical | 1. place beaker on balance and set to 0, add oil to beaker and record mass of oil
2. place thermometer and immersion heater into the oil, read starting temp of oil
3. wrap beaker in insulating foam to reduce thermal energy transfer to surroundings
4. connect joule meter and power pack to immersion heater, time for 30 mins
5.read total number of joules of energy that passed into immersion heater and final temp of oil
6. calc specific heat capacity with
C. ΔE/ (Δ0 ⨉ m) |
| calc | 1670 J/kg°C |
| what are some sources or inaccuracy in the specific heat capacity practical and how would you prevent them | - thermal energy passing out of the beaker to the air, prevented by using an insulator with lower thermal conductivity
- not all thermal energy from immersion heater passes through to oil, to prevent this, ensure that immersion heater is fully submerged
- incorrect reading of thermometer, use electric temp probe
- thermal energy not being spread in oil, stir the oil |
