Question

use the table to answer the questions below. when the temperature in a room increases from 25°c to 33°c, changes from a solid to a liquid. in a lab, methane and nitrogen are cooled from -170°c to -200°c. the methane freezes and the nitrogen . when gold is heated to 2,856°c it changes from a liquid to a . done

Explanation:

Step1: Check melting - boiling points for first question

The room temperature changes from 25°C to 33°C. Gallium has a melting - point of 30°C, so it changes from solid to liquid in this temperature range.

Step2: Check melting - boiling points for second question

Methane and nitrogen are cooled from - 170°C to - 200°C. Methane's melting - point is - 183°C and boiling - point is - 162°C. Nitrogen's melting - point is - 210°C and boiling - point is - 196°C. Since the final temperature (-200°C) is between nitrogen's melting and boiling points, nitrogen remains a liquid.

Step3: Check melting - boiling points for third question

Gold's boiling - point is 2856°C. When heated to 2856°C, gold changes from a liquid to a gas (vaporizes).

Answer:

Gallium; remains a liquid; gas