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Phase changes in pure water occur at a specific temperature. 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 much power does it take to boil water?

What c in the equation is, the specific heat capacity. So in water it takes 1200 joule’s to raise a Kg of water by 1 degree K or in degrees C. If this takes 1 min to boil the power required to boil the water equals 96kilo joules/60 seconds =**1600 watts** or 1.6 kilo watts.

## How much energy does it take to boil 1 Litre of water?

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 energy does it take to boil water calculator?

The specific heat capacity of water is 4.18 J/g/°C. We wish to determine the value of Q – the quantity of heat. To do so, we would use the equation **Q = m•C•ΔT.** The m and the C are known; the ΔT can be determined from the initial and final temperature.

## Does it take a lot of energy to boil water?

Explanation: In order to cause water to increase in temperature, the energy being put into the water first needs to break hydrogen bonds between the water molecules. **Hydrogen bonding in water is significant**, so it takes a significant amount of energy to overcome them.

## What is the most economical way to boil water?

For appliances – **microwave**, electric tea kettle, electric stovetop – the most efficient appliance is the one that can boil water while pulling in the least amount of electricity via its plug.

## What uses more energy to boil water?

**An electric stove** requires more energy and time to heat up, thus it takes longer to heat the water inside the kettle. However, an electric stove is more efficient in delivering energy to the kettle.

## Why is energy needed to boil water?

Boiling water is an endothermic process, which supplies **heat to the water molecules**, increasing their potential energy. The applied heat causes the water molecules to move further away from each other without causing any increase in overall temperature.

## How much energy is required to boil 150g water?

= 150 g x 4.184 J/g/K x (373 – 298) K = **47,070 J**. Thus, 47,070 J are needed to increase the temperature of 150 g of water from 25 degrees C to its boiling point of 100 degrees C.

## How much energy does it take to boil 100 ml of water?

So 100ml of water has a mass of 100 grams. The change in temperature is (100°C – 27°C) = 73°C. Since the specific heat of water is 4.18J/g/°C we can calculate the amount of energy needed by the expression below. Energy required = 4.18 J/g/°C X 100g X 73°C = **30.514KJ**.

## How many kilowatts does it take to heat a gallon of water?

Cost To Heat Water Using Electricity

One BTU is 0.000293 kWh. It will take **0.195 kWh** to heat a gallon of water, or 0.195 x 1000 = 195 kWh to heat 1000 gallons. At $0.11/kWh, it costs 195 x $0.11 = $21.45 to heat 1000 gallons of water.

## How much energy does it take to raise 1 degree of water?

One of water’s most significant properties is that it takes a lot of energy to heat it. Precisely, water has to absorb **4,184 Joules of heat (1 calorie)** for the temperature of one kilogram of water to increase 1°C.

## What is the energy required to boil 85.5 g of water?

The amount of heat needed to allow one mole of water to undergo this phase change is called the enthalpy chnge of vaporization, ΔHvap . This tells you that in order to boil one mole of water at its boiling point, you need to provide it with **40.66 kJ** of heat.