Classify each underlined property or change as either intensive or extensive, and either chemical or physical.
(a) The color of mercury is silvery.
(b) The sample of iron rusts by reaction with oxygen.
(c) The heat released by burning coal can power a city.
(d) Water boils at 100 °C.
(e) A new pencil is 10 inches long.

Strategy

Look at the property or change to determine whether it depends on the amount of matter (intensive as opposed to extensive), and notice whether new and different matter forms (chemical as opposed to physical).