Question

Identify which compound in each pair has the higher property.

a. surface tension H2O or C6H14

b. viscosity C7H8 or C3H8O3(glycerol)

c. vapor pressure CH3F or H2O

Answer 1

For letter a, water has the higher surface tension, as it has H-bonds, compared to hexane, which only has covalent and dispersion forces.

For letter b, if C₇H₈ is toluene, we can say that glycerol has higher viscosity, this due to the length of the chain and that it has ability to have intermolecular forces among the molecule. Toluene, otherwise, is a closed cycle.

For letter c, CH₃F has a higher vapor pressure than water, as H-F bonds are stronger than H-O bonds, and CH₃F has more sites to make bondings than water.