Question

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.

Answer 1

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

Step-by-step 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.