Based on the above answers and examples, to boil 1 litre of water from 20C to 100C, requiring 0.183 kWh of either electricity or gas, at todays energy prices GAS is 68% cheaper than electricity.
How much electricity does it take to boil water?
But for simplicity’s sake, let’s return to Earth and a sea-level kitchen. In our kitchen, we need to get those 500 mL of water from room temperature (21C) to boiling (100C) by adding energy – 165,000 Joules (or 0.046 kilowatt hours), to be precise – in the form of heat.
How much energy does it take to heat a Litre of water?
a watt is . 24 calorie per second. It takes 1000 calories to raise 1 liter of water one degree C. So apply about 4000 watts for one second to do this.
How many kWh does it take to boil a kettle?
Power usage – Kettles
The average kettle is between 2 and 3 kilowatts (kw). The electricity that you use in your home is measures in kilowatt hours (kWh) which is the number of kilowatts used per hour. Most people will be charged per unit of electricity so you might be charged 12p per kwh used.
Is it cheaper to boil water by gas or electric?
Because gas is cheaper than electricity, it works out slightly cheaper to boil water on a gas hob than using an electric kettle, as long as you are boiling just the quantity you need and switch off the hob as soon as it has boiled.
How do I calculate kWh?
The “kilowatt-hours” you see on your power bill expresses the amount of power that you consumed in a month. To calculate the kWh for a specific appliance, multiply the power rating (watts) of the appliance by the amount of time (hrs) you use the appliance and divide by 1000.
How many joules does it take to boil 1 Litre of water?
At 1 atm, water freezes at 0° C and boils at 100° C. The energy required to change water from a liquid to a solid is 333.7 kJ/kg while the energy required to boil water is 2257 kJ/kg.
How many kW is a kWh?
1 kWh equals one hour of electricity usage at a rate of 1 kW, and thus the 2 kW appliance would consume 2 kWh in one hour, or 1 kWh in half an hour. The equation is simply kW x time = kWh.
How many kWh does it take to heat a water tank?
Immersion heaters are measured in kW
If you take the example of required temperature rise above and you have a 3kW immersion heater it would take about 2hrs 30 to heat the water (3kW each hour, so in two and a half hours that would give 7.5kW).
How many kWh per month is normal?
The US Energy Information Administration (EIA) states that the average US citizen uses an average of around 909 kWh of energy per month, which equates to around 10,909 kWh per year.
Does it take more energy to boil a full kettle?
If however, the kettle were say only half filled, it would take approximately half the time to boil and therefore only consume half the electricity. So if you’re pulling all the stops to minimise your energy bill, only fill the kettle with as much water as you need at that moment.
How many kWh does a house use per month UK?
From this, we can work out that in a house with medium electricity use, the average monthly electricity use is about 242kWh. (2,900kWh divided by 12 months).