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Does it take more energy to heat the water to 100 degrees Celsius or to boil it?
Wiki User
∙ 7y ago
q (heat energy in Joules) = mass * specific heat * change in temp
1st problem:
q = (100 g H2O)(4.180 J/gC)(100 C - 50 C)
= 20900 Joules
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2nd problem:
q = (100 g H2O)(4.180 J/gC)(70 C - 60 C)
= 4180 Joules
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As you can see from 50 C to 100 C takes much more heat energy as one would intuitively think, 20900 J/4180 J = 5 times as much energy.
Wiki User
∙ 12y ago
Wiki User
∙ 7y agoIf 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.
Wiki User
∙ 13y agoNo, it obviously takes less energy because hot water is closer to the target temperature than warm or ice water.
Comment: see discussion page.
Wiki User
∙ 8y agoIt takes more energy to heat the water than to boil it because, once you get to the boiling point you stay at the boiling point.
Wiki User
∙ 7y agoTo boil it.
Anonymous
kj'
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What temperature does pure water freeze and boil?
Pure water freezes at 0 degrees Celsius and boils at 100 degrees Celsius.
What temperature do water boil at?
Water boils at 212 degrees Fahrenheit, or 100 degrees Celsius, or 273 Kelvin.
What temperature does water boil at Celsius degree?
At sea level water boils at 100 Celsius.
Water boils at a temperature of what degrees on the Celsius scale?
The Celsius scale is in fact based on water, it freezes at 0 degrees and boils at 100 degrees Celsius at 760 mm Hg pressure.
Does one liter of water at 50 degrees celsius have more less or the same kinetic energy as 2 liters of water at 50 degrees Celsius?
No, all pure water boils at 100oC., 212oF., assuming all other 'standard' conditions apply.
How many degrees Celsius must it be to for water to boil?
100 degrees Celsius
What degrees celsius does water boil at?
It boils at 100*C.
When does water boil for Fahrenheit and Celsius?
100 degrees Celsius 212 degrees Fahrenheit
When will water boil at a temperature less than 100 degrees Celsius?
Water can boil below 100 degrees Celsius depending on the area of the world. A lab was conducted in science class that our water boiled at 94.6 degrees Celsius. The average boiling point for water is 100 degrees Celsius but that does not mean it will always be that degree to boil.
How can water made to boil at 95 degrees celsius or 105 degrees celsius?
it can be made to boil at 105 degrees Celsius if we add impurities to it,as impurities raise the boiling point.
What temperature does water boil?
One-hundred degrees celsius
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.
What does water boil at?
100 degrees Celsius 212 degrees Fahrenheit
What does water boil in celsuise?
100 degrees Celsius
What terperatue does water boil?
100 degrees Celsius
What temperature does Celsius boil at?
Water boils at 100o Celsius. It freezes at 0o Celsius.
When does the water boil in Celsius?
100 degrees Celsius or 212 degrees Fahrenheit
