Heating
Heat can
Predict the temperature rise from a heater running for 60 s.
E = mcΔθ
Apparatus
- Insulated can of water
- Immersion heater
- Thermometer
- c = 4 200 J/kg °C
Method
- Set the mass of water and the heater power. Leave heat loss off for the first run.
- Predict Δθ = Pt / (mc) for 60 s.
- Heat for 60 s and read the thermometer.
- Turn heat loss on and run again. The rise should be smaller.
Real heaters, steam, and hot cans burn. This one does not.
20°
Waiting at 20 °C
Temperature
20°C
Heater energy
0J
Ideal rise
11.4°C
Power
400W
Without losses, the rise matches E = Pt = mcΔθ. The model stops at 100 °C.
Back to the Heating lesson