How much energy is needed to vaporize 5.00 g of water?

1 Answer
anor277
Jun 29, 2017

We need the enthalpy of vaporization of water.......

Explanation:

For the reaction.......

#H_2O(l) +Delta rarr H_2O(g)#

WHERE BOTH PRODUCT AND REACTANT ARE AT #100# #""^@C#,
..........

#DeltaH_"vaporization"^@=40.66*kJ*mol^-1#

And thus we need to assess the molar quantity of the water vaporized......

#DeltaH_"rxn"=(5.00*g)/(18.01*g*mol^-1)xx40.66*kJ*mol^-1=11.3*kJ#.

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