boiling points?

Question

CH3CH2OH boils at 78 degrees and CH3OCH3boils at -24degrees C, although both compounds have the same composition. The difference in boiling points may be attributed to a difference in
A.Molecular mass
B.Density
C.Specific heat
D.Hydrogen bonding
E.Heat of combustion

Answer 1

Answer to your question is hydrogen bonding.
Hydrogen bonding in a liquid raises the boiling point of a liquid.
Incase of CH3CH2OH, there is hydrogen bonding due to the presence of -OH group.
CH3CH2O-H---O-CH2CH3
/
H -----O-CH2CH3
/
H
and so on.
However there is no hydrogen bonding in case of ethers.
therefore they have low boiling point than alcohols.

note: the H in the above diagram in the 2nd and 4th line are bonded to O and not to C or H respectively as it is seen in the above figure.

Answer 2

I think that the answer shold be C. Specific heat.
Specific heat capacity is the amount of heat required to raise the temperature of 1K of the substance through 1K or 1 degree celsius.
Substances with a high specific heat capacity warm up or cool more slowly.
I can't really confirm whether my answer is correct, but at least there's something for reference.

Answer 3

D. Hydrogen Bonding

Answer 4

from process of elimination starting with a......

a.mass does not have anything to do with bp
B.nor does density
C.the heat the object is set at does not matter
E.heating of combustion is not even much on the line of bp

leaving u with D which is hydrogen bonding :)

Answer 5

i think the answer for your question is b. density because boiling points also depends on the density of the element...

Answer 6

It's New Years Eve, do you honestly think someone is going to give you a sober answer?

Answer 7

d.Hydrogen bonding