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The amount of energy to boil water depends on two things: the amount of water and the temperature of the water when you start.

The more water water, the more energy it takes. The colder the water, the more energy it takes.

Let say the water is at room temperature, or 20 °C. First, the water must be heated to 100 °C, which takes energy. The amount of energy is given by the specific heat of water, which is 4.186 Joule/gram °C. That means that requires 4.186 Joules of energy to heat 1 kilogram of water by 1 °C. So if you have 1 kilo grams of water at 20 °C, you have to add this much energy:

= (4.18Joule/gram °C) (100g) (100 °C - 20 °C)

= 334400 joules/°C

Of course, if you had more or less water, or it was colder or warmer, you would adjust this equation accordingly..

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Wiki User

12y ago
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Anonymous

Lvl 1
3y ago
Latent heat of steam?
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Keith Robinson

Lvl 1
2y ago
Your equation should read
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Keith Robinson

Lvl 1
2y ago
= (4.18Joule/gram °C) (1000g) (100 °C - 20 °C) = 334400 joules.
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Keith Robinson

Lvl 1
2y ago
Equation should be:= (4.18Joule/gram/°C) (1000g) (100 °C - 20 °C) = 334400 joules
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Wiki User

9y ago

The energy required to boil water will depend upon the starting temperature of the water, your location above or below sea level, and the mass of water being boiled. This is because the boiling point of a substance is when its vapor pressure equals the pressure surrounding the liquid.

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Wiki User

14y ago

The answer depends on the volume of water and the current temperature.

It takes 1 calorie (~4.190 J) to raise 1 gram (1ml) of water 1 degree C.

To raise 1 gram of water from 0 degrees C (freezing) to 100 degrees C (boiling) it would take 100 calories (~419.0 joules).

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11y ago

Depends how much water and the temperature of the water.

To heat 1 mL of water by 1 degree C 1 cal of energy (4.184 Joules) is required. Assuming that the water is at 25 degrees C, to boil one litre (liter) of water you would require 75,000 cal or 313.8 kJ. Or 16.74 g of mars bar ;).

In terms of solar energy a 180 watt solar panel would take just under half an hour to gather enough energy to boil a litre of water from 25 degrees C (provided it's receiving maximum sunlight of course.

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Wiki User

10y ago

The specific heat capacity of water is 4.184 kJ.kg-1.K-1.

1 liter of water has a mass of 1kg. The boiling point of water is 100 0C. Delta T is thus 100-15 = 85 0C. 1 Kelvin is equivalent to 1 0C.

So 4.184 x 1 x 85 = 355.64 Kilojoules of energy.

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6y ago

Heat energy. However, it is easy to convert most types of energy into heat energy; for example, by vigorously stirring the pot, the mechanical energy will quickly be converted into heat energy.

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Wiki User

12y ago

Water doesn't boil until 216 degrees. So any amount of energy won't work at 100 degrees

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Anonymous

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3y ago
of course it does, it freezes at zero and boils at 100..

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14y ago

From 22 degrees room temperature in a perfect world in a vacum, 3276kJ. Pure water From 22 degrees room temperature in a perfect world in a vacum, 3276kJ. Pure water

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12y ago

On the average, over the temperature range from zero to 100 Celsius,

it takes 1 calorie of energy to heat each milliliter of water you have

by 1 degree Celsius.

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Wiki User

11y ago

Thermal energy, a type of kinetic energy, is required for a substance to boil.

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Q: How much energy is needed to boil water at 100 degrees?
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Related questions

What is the boiling of water in degrees celsius?

The amount of heat needed to boil water varies with the air pressure. Water in a vacuum will boil at room temperature.


How many more degrees does 87 degrees does it need to boil?

If its in Celsius then another 13 degrees are needed because water boils at 100 degrees Celsius


What temp does a kettle need to be to cause evaporation?

the temperature that is needed to boil water is 100 degrees Celsius or over.


What degrees to boil water?

102


What would happen if you increased the temperature in water?

the water molecules would begin to move faster (an increase in kinetic energy). if the water reached 100 degrees celcius (212 degrees Fahrenheit), it will boil.


Does it it take more energy to heat the water to 100 degrees celsius or boil it?

If by "boil" you mean have it all evaporate, that takes MUCH more energy. For example, to increase the temperature of one gram of water from 20 to 100 degrees Celsius, you need 4.2 joules/gram/degree times 80 degrees = about 336 joules; then, to evaporate all the water, you need an additional 2257 joules.


Does ice melt and boil at specific tempurtures?

Yes, usually water will melt at anything above 0 degrees celsius or boil at 100 degrees. However pressure and altitude can change the required temperature needed for boiling/melting. The higher pressure the lower temperature required and vice versa The higher altitude the less temperature needed


What does water boil at?

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Why do you need heat to boil water?

That is related to the Law of Conservation of Energy. To boil water, you need to get it hotter, that requires energy, and this energy has to come from somewhere.


Will water boil at 97.0 degrees Celsius in the US?

No, since there is no such thing as degrees "celius". Water will boil at 97.0 degrees Celsius at approx 850 metres above sea level.


How long does it take to boil sugar to 300 degrees?

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What temperature does the water have to be to boil?

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