Ammonia and hydrogen fluoride both have unusually high boiling points due to _____.

Explain the observed trend in the boiling points of these compounds.

H₂Te -2 °C

H₂Se -41.5 °C

H₂S -60.7 °C

H₂O 100 °C

In Table 11.3, we saw that the viscosity of a series of hydrocarbons increased with molecular weight, doubling from the six-carbon molecule to the ten-carbon molecule.

(a) The eight-carbon hydrocarbon, octane, has an isomer, isooctane. Would you predict that isooctane would have a larger or smaller viscosity than octane? Why?

Explain each of the following observations:

c. The boiling point of HF is much higher than those of the other hydrogen halides.

Which compound has the highest melting point: Al₂(CO₃)₃, C₁₂H₂₂O₁₁, C₈H₁₈, or H₂O?

A liquid with high viscosity _____ flow easily and _____ effective in wetting a surface.

Which would have a higher vapor pressure: ethanol (C₂H₅OH) or dimethyl ether (CH₃OCH₃)?

Choose the correct description of viscosity. Under what conditions does magma have high viscosity?