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15. When water evaporates it is an endothermic process. The balanced equation is written as follows: H200) H2O(g) AHrxn = 44.
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4-4 .10 KJ Jhir means that theat Pww s neede 44. 10 KJ to evaporete 1 mole So, heat for 1 mole H,0 )44-10 KJ need evapration

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