How much energy does it take to heat 1gm water by 1degree C at sea level?

Answer 1

this is a question about specific heat capacity (joules/gram multiplied by degrees celsius, it takes 4.19 joules of energy to heat 1 gram of water by one degree celsius, it takes double that to heat 1 gram of water by 2 degrees celsius, and so on and so forth,

Answer 2

By definition, it takes 1 calorie or 4.184 J to raise 1 gram of water by 1 degree C. This concept is known as specific heat.

It is important to note that specific heat is a function of temperature, however it only changes slightly, and is ignored in most lower level courses.

Answer 3

The quantity you describe is known as the Specific Heat Capacity. You probably know this and I'll refer to it as SHC from now on.

Though others have mentioned that heating water requires 4.2J/g/*C, it is worth adding a couple of additionals

Water can exist in solid and gaseous forms too

Solid water (ice, duh!) has an SHC of 2.1
Gaseous water (steam) is about 4.3
Liquid water is (as already stated) 4.2

SHC is dependent on pressure (apparently, though I don't know by how much) and it isn't constant either.
Steam's SHC rises by 0.4J/g/*C between 100 and 200*C. A similar situation is true of Ice and water too (though, again, I don't know how much they change by or whether the change is linear)

It's also important to remember that this is for PURE WATER.
Sea water has about 3.5g of Sodium Chloride dissolved in it per 100ml on average. This needs heating up too so SHC increases with impurity.

Such a simple question with an answer made unnecessarily complicated by a guy with too much time on his hands.

Hey, you might as well know the truth.

Answer 4

1 Calorie

Answer 5

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Answer 6

At a temperature of 15C it takes 4.186J (1 calorie).

HTH ☺

Doug

Answer 7

That's the definition of one calorie.

Answer 8

One calorie.

Answer 9

1g + 1 calorie ( or 4.184 Joules) = 1°C

1cal/g/°C or 4.184J/g/°C

Answer 10

4.18 kilo joules