Discussion
The temperature of saturated steam rises above 100 degrees Celsius only when
Answer: A
Correct answer: the pressure is raised above atmospheric
Saturated steam sits at the boiling point corresponding to its pressure, and at atmospheric pressure that is 100 degrees however much heat is supplied. Raising the pressure raises the boiling point, so at 15 pounds per square inch above atmospheric the steam is at 121 degrees. The pressure is therefore only the means; it is the temperature that sterilises.
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