Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 18 - Think and Explain: 46

Answer

If "twice as hot" is taken literally, twice the internal energy means the temperature is twice the current absolute temperature, which is 273 K. $$T_{new} = 2(273 K) = 546 K$$ Convert the absolute temperature in kelvins to the Celsius temperature scale by subtracting 273, finding $273^{\circ}C$.
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