Question

which of the following would have a lower melting point? hf n2 hcl ch3cl 35 multiple choice 1 point which of the following would have a higher boiling point? c2h5oh c2h5cl o2 c2h6

Explanation:

Step1: Analyze intermolecular forces

Melting and boiling points are related to the strength of intermolecular forces. The main types are hydrogen - bonding, dipole - dipole, and London dispersion forces.

Step2: Evaluate first set of compounds

• HF has hydrogen - bonding (F is highly electronegative), dipole - dipole, and London dispersion forces.
• N₂ is non - polar, only has London dispersion forces.
• HCl has dipole - dipole and London dispersion forces.
• CH₃Cl has dipole - dipole and London dispersion forces. Since N₂ has only weak London dispersion forces among them, it has the lowest melting point.

Step3: Evaluate second set of compounds

• C₂H₅OH has hydrogen - bonding (due to O - H group), dipole - dipole, and London dispersion forces.
• C₂H₅Cl has dipole - dipole and London dispersion forces.
• O₂ is non - polar, only has London dispersion forces.
• C₂H₆ is non - polar, only has London dispersion forces. C₂H₅OH has the strongest intermolecular forces due to hydrogen - bonding, so it has the highest boiling point.

Answer:

1. B. N₂
2. A. C₂H₅OH