human
I'm trying to find out what a kilowatt is and how much energy it takes to boil water.
assistant
A kilowatt (kW) is a unit of electrical power equal to 1000 watts, or 1 kW = 1000 W. To calculate the amount of energy needed to boil one liter of water, you need to know the specific heat capacity of water, which is 4184 J/kg K. So if boiling one liter of water requires 100 J of energy, then it will take 10 kJ to boil one liter of water.