Q.
An electric immersion heater of 1.08kW is immersed in water. After the water has reached a temperature of 100∘C, how much time will be required to produce 100g of steam?
The heat required for producing 1g of steam =540cal=540×4.2J=2268J
Energy given by immersion heater is =1.08kW=1080W
Now time taken in boiling 100g of water =10802268×100=210sec