Which statement below is true?
a)at a given temperature, c2h6has a higher vapor pressure than c4h10.
b)the strongest intermolecular attractive forces present in liquid ccl4are dipole-dipole forces.
c)hcl has a higher boiling point than licl.
d)h2o has a greater polarizability than h2se.
e)in general, the stronger the intermolecular attractive forces, the lower the ∆hºvap.

a) At a given temperature, C₂H₆ has a higher vapor pressure than C₄H₁₀.

Explanation:

Which statement below is true?

a) At a given temperature, C₂H₆ has a higher vapor pressure than C₄H₁₀.  TRUE. C₂H₆ has a lower molar mass than C₄H₁₀ and a higher vapor pressure at most temperatures.

b) The strongest intermolecular attractive forces present in liquid CCl₄ are dipole-dipole forces.  FALSE. CCl₄ is nonpolar, so the strongest intermolecular forces are dispersion forces.

c) HCl has a higher boiling point than LiCl.  FALSE. LiCl (ionic compound) has a higher boiling point than HCl (covalent compound).

d) H₂O has a greater polarizability than H₂Se.  FALSE. Se has a larger atomic radius than O which is why H₂Se has a greater polarizability than H₂O.

e) In general, the stronger the intermolecular attractive forces, the lower the ∆Hºvap. FALSE. In general, the stronger the intermolecular attractive forces, the higher the ∆Hºvap.

b.

the accuracy of the data.