Energy management has become a crucial field in increasing the efficiency of our everyday use of energy.
One of the most energy consuming activities is the boiling of water. In order to understand the energy
consumption, you need to have understanding on thermodynamics and electricity.
Solve the calculation below:
We use an electric immersion heater to heat 2,0 liters water having temperature of 20C to the boiling
point. Specific heat capacity of water is 4,19 kJ/(kg C). The power of the heater is 1,50 kW and efficiency
of heating is 80 %. How much time does the heating take?