For which molecule in each of the following pairs would you expect hydrogen bonding, in a sample of the pure substance, to be more significant as a contributing factor to the attractive intermolecular interactions? Ⓒ (CH₂OH)2 O (CH3)2CHOH O PH3 ON₂H4 OCH3CH₂OH(CH3)2CO ⒸH3PO4 C₂H6

5. Indicate the predominant intermolecular forces that exist between the following molecules/compounds and arrange them according to increasing melting points. CO₂ H₂ N₂H₂ Diamond NaCl CaCO3 Lowest melting point Highest melting point

Identify the intermolecular forces of the following compoundsa) HClb) HNOc) AsNd) CH3NH2e) FCN

Which do you expect to have the greatest surface tension? ethanol CH3CH2OH, ethane CH3CH3, chloroethane CH3CHCI, bromoethane CH3CH2Br

Indicate what the strongest intermolecular interaction (dispersion forces, dipole-dipole interaction, hydrogen bonding) would be for each molecule as a pure substance.

Decide which intermolecular forces act between the molecules of each compound in the table below. compound 1₂ iodine water CHA methane carbon monoxide intermolecular forces (check all that apply) dispersion dipole hydrogen-bonding ▬ L 0 X

Which should have a higher enthalpy of vaporization, CF4 or CBr4? Explain the role of intermolecular forces in your decision.