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Which compound is most likely to have the highest heat of vaporization?
A. H2O B. NH3 C. HF D. all three are the same
They are all liquids at room temperature aren't they?
doesn't specify however they should be
All have the capability to hydrogen bond including an Hydrogen covalently bonded to either an F,O, or N
So i don't see how they could have equal heats of vaporization, to me one factor to consider would be molecular mass as well.
If mass was taken into consideration it would be HF as it has the biggest molecular mass
Water has a heat of vaporization value of 40.65 kJ/mol. ΔvapH (kJ/mol) Temperature (K) HF 25.2
HF has a larger molecular weight than water and the same ability to hydrogen bond so why would these values be different?
Hey can't we take it because all of it has the capability of forming H bonds. H bonds have the highest bond strength Hence the heat needed for liquid to convert to vapor is high. So I think all have the same range
The intermolecular bonds possibly
BTW the say that H2O is the answer.
so, they say that water can form more hydrogen bonds than HF, so it's the extent of H-bonding
Good to know
H2O can form 2 where as the other two can only form 1 each
messy but I think this solves our problem
Yep I believe it does