Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Dr. Wong's assistant made the observations below while heating a sample of solid hydrogen. Using the data and observations in the table below, create a heating curve for hydrogen that Dr. Wong can reference during his laboratory testing. Be sure to include and label the following items in your heating curve:

  • Create temperature and time intervals that are appropriate for the data.
  • Don't start the temperature on the graph at 0 °C because the time intervals will be too large for the hydrogen data.
  • Label the melting and boiling points on the curve.
  • Label the three states and the two transition phases on the curve.

 

Heating data:

Time (Minutes) Observations
0:00 Hydrogen is a solid at −263 °C. Heat is added to sample.
2:43 Hydrogen begins to change into a liquid at −259 °C.
6:15 Temperature of the liquid begins to increase.
10:36 Hydrogen begins to form a gas at −253 °C.
14:01 Temperature of the gas begins to increase.
18:00 Final temperature of hydrogen gas is −245 °C.
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