# How much electricity does it take to boil a gallon of water?

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One BTU is the amount of heat energy required to raise one pound of water by 1ºF. Water weighs 8.33 pounds per gallon so we can calculate that one gallon of water requires 8.33 BTU to raise the temperature 1ºF.

## 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.

## Is it cheaper to boil water by gas or electric kettle?

Electric kettles are slightly more energy-efficient, coming in at around 80%, vs 70% efficiency on the stovetop. However, this is evened out by the fact that gas is cheaper per unit than electric. Then you need to factor in the fact that stovetops take longer to boil water vs an electric kettle.

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## Is it cheaper to boil water in a kettle or microwave?

The kettle is more efficient. … Microwave ovens at the other hand usually have a 60-65% power efficiency just for microwave generation. So if both electrical appliances have a same power, the kettle will be faster and cheaper in energy.

## How much energy does it take to boil water calculator?

The energy needed E=SH times change in temperature times the total mass in grams(Which is 1000gram for a liter of water). That gives you 4.184•79•1000 which is 330,536J, or 330.54KJ.

## What uses the most electric in a house?

The top 10 energy costs in your home

1. HVAC. The answer to the question of which household appliances use the most power is heating and cooling, and top of the list is your HVAC system. …
2. Water heating. …
3. Refrigerator. …
4. Washer and dryer. …
5. Electric oven and stove. …
6. Dishwasher. …
7. Lighting. …
8. Television and media equipment.

## Does kettle consume electricity?

1. Does an electric kettle use a lot of electricity? Yes, an electric kettle consumes a lot of energy. The minimum energy consumed by an electric kettle is around 1200 W, while most kettles have a maximum power rating of 3000 W.

## Does a kettle use more electricity than a microwave?

Which is more energy efficient – boiling water using an electric kettle, a kettle on a gas hob or a microwave oven? IT TAKES the same amount of energy to heat one litre of water no matter which method of heating used. The only difference in the methods is the amount of time each takes.

## Is boiling a kettle expensive?

Kettle – 2.5 pence

It turns out that the average kettle holds around 1.5 pints and uses a single unit of electricity. That means you pay about 2.5 pence each time you boil the kettle for a hot brew.

## Why you should never microwave water?

Safety of boiling water in the microwave

That said, the electromagnetic waves in microwaves heat water molecules in random spots. This means that if the water is not heated long enough, pockets of boiling water may develop below a layer of cooler water. Therefore, it’s important to stir the water prior to use.

## Why is microwaved water bad?

Boiling a cup of water in the microwave may seem harmless, but it turns out to be a really bad idea. Heating plain water in a ceramic cup or a glass for too long keeps bubbles from building. As a consequence, the liquid can ́t cool down, becomes superheated and erupts boiling water when the glass is moved.

## What boils water faster gas or electric?

Here’s a breakdown of the results. It took a little over 4 minutes to boil water on an induction cooktop. That was three minutes faster than on an electric coil (about 7 minutes), and four full minutes faster than on the gas range (about 8 minutes). Induction was the clear winner in our test kitchen.

## Does boiling a full kettle use more electricity?

That means overfilling translates to 3.2% of our domestic electricity bill.” So by using our kettles more effectively, we can potentially make decent savings. … Also, descale your kettle regularly, as if it is full of limescale you use more energy to boil the same amount of water.

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## What type of energy is boiling water?

Boiling water on a stove is an example of thermal energy. Thermal energy is produced when the atoms and molecules in a substance vibrate faster due to a rise in temperature.

## How do you calculate the energy of water?

The heat of fusion of water is 333 J/g. The equation relating the mass (48.2 grams), the heat of fusion (333 J/g), and the quantity of energy (Q) is Q = m•ΔHfusion.

Heat and Changes of State.

Process Change of State
Condensation Gas to Liquid
Sublimation Solid to Gas
Deposition Gas to Solid