Holt Modern Biology 1st Edition by John Postlethwait ,Janet Hopson

Exercise 57

Analyzing Data The table below shows melting and boiling points at normal pressure for five different elements or compounds. Above the boiling point, a compound or element exists as a gas. Between the melting point and the boiling point, a compound or element exists as a liquid. Below the melting point, a compound or element exists as a solid. Use the table to answer the following questions:
A. At 20°C and under normal pressure conditions, which substances exist as solids? as liquids? as gases?
b. Which substance exists as a liquid over the broadest range of temperature?
c. Which substance exists as a liquid over the narrowest range of temperature?
d. Which one of the substances are you least likely to encounter as a gas?