how are the vapor pressure and boiling point of alkynes affected as the chain length increases? both vapor…

how are the vapor pressure and boiling point of alkynes affected as the chain length increases? both vapor pressure and boiling point decrease. both vapor pressure and boiling point increase. vapor pressure increases, and boiling point decreases. vapor pressure decreases, and boiling point increases.

how are the vapor pressure and boiling point of alkynes affected as the chain length increases? both vapor pressure and boiling point decrease. both vapor pressure and boiling point increase. vapor pressure increases, and boiling point decreases. vapor pressure decreases, and boiling point increases.

Answer

Brief Explanations:

As the chain - length of alkynes increases, the molecular mass and surface area increase. This leads to stronger London - dispersion forces. Stronger intermolecular forces mean more energy is needed to separate the molecules. So, the boiling point increases. Vapor pressure is inversely related to the strength of intermolecular forces. With stronger forces, fewer molecules can escape into the vapor phase, thus vapor pressure decreases.

Answer:

Vapor pressure decreases, and boiling point increases.