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Chemistry
How much steam from 500 calories of heat added to 2 litres of water?
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How much steam from 500 calories of heat added to 2 litres of water?
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xam
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How much steam from 500 calories of heat added to 2 litres of water?
«
on:
15/10/2011 19:01:02 »
xam asked the Naked Scientists:
If five hundred kcal of heat is added to 2kg of water at 80C, how much steam is produced?
What do you think?
«
Last Edit: 15/10/2011 19:01:02 by _system
»
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CliffordK
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How much steam from 500 calories of heat added to 2 litres of water?
«
Reply #1 on:
15/10/2011 19:28:30 »
Is this a math and science homework problem?
Typically I start by converting everything to grams and calories.
1000 calories = 1 kCal.
1000 grams = 1 kg.
1 calorie will raise 1 gram of water 1C.
However, it takes 79.72 calories to vaporize one gram of water at 100C.
So, what you basically do is calculate the number of calories to raise the water from 80C up to 100C
Subtract that from your total amount of energy, and that gives you the energy left to vaporize the water. If it is negative, then you would not get any steam, and you could calculate the final temperature.
Assuming you still have some energy left over, you simply divide the the remaining energy at 100C by 79.72 calories/gram to get the number of grams of steam vaporized.
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Geezer
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How much steam from 500 calories of heat added to 2 litres of water?
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Reply #2 on:
15/10/2011 20:00:42 »
I'll give you a hint - less than half of it.
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How much steam from 500 calories of heat added to 2 litres of water?
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