Question

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

Answer 1

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`.