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How much heat is evolved when 1260 g of water condenses to a liquid at 100.°C?

How much heat is evolved when 1260 g of water condenses to a liquid at 100.°C?
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How much heat is evolved when 1260 g of water condenses to a liquid at 100.°C?

User Nique
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To solve this you need the value for ΔHvap for water, which is a constant that tells you how much energy is used/released when water changes it's physical state from vapour to liquid, or liquid to vapor. 
User David Joyner
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moles H2O = 1233 g/ 18 g/mol=68.5 68.5 x 40.7 =2788 kJ
User Smasell
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