Of state. Contents and Concepts 1. Comparison of Gases, Liquids, and Solids Changes of State

FIGURE 11.14

The caffeine molecule

Space-filling model of caffeine, C8H10N4O2.

FIGURE 11.15

Decaf coffee

Coffee that was “naturally decaffeinated” using supercritical carbon dioxide

See Problems 11.123 and 11.124.
11 States of Matter; Liquids and Solids

Concept Check 11.2

When camping at high altitude, you need to pay particular attention to changes in cooking times for foods that are boiled in water. If you like eggs that are boiled for 10 minutes near sea level, would you have to cook them for a longer or a shorter time at 3200 m to get the egg you like? Be sure to explain your answer. Liquid State Now we will look at some physical properties of liquids. After that, we will explain the experimental values of these properties in terms of intermolecular forces.