8. Gases, Liquids and Solids

Which of the following will have the lowest boiling point?

Which molecules would most likely cause a liquid to have the lowest viscosity?

Which of the following should have the highest surface tension at a given temperature?

Would you expect the boiling points to increase or decrease in the following series? Explain.

a. Kr, Ar, Ne

Compare the ∆H_vap values for water, isopropyl alcohol, ether, and ammonia, and order them from lowest to highest. Explain the rank order based on intermolecular attractive forces.

What is the effect of pressure on a liquid's boiling point?

Match the following physical and chemical properties with octane, C₈H₁₈ found in gasoline, or magnesium sulfate, MgSO₄ also called Epsom salts:

d. is a liquid at room temperature

Match the following physical and chemical properties with potassium chloride, KCl, used in salt substitutes, or butane, C₄H₁₀ used in lighters:

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e. is a gas at room temperature

Match the following physical and chemical properties with potassium chloride, KCl, used in salt substitutes, or butane, C₄H₁₀ used in lighters:

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a. melts at -138°C