Answered: When 50 g of ethanol is heated from T1…

Chemistry In Focus

7th Edition

ISBN:9781337399692

Author:Tro, Nivaldo J.

Publisher:Tro, Nivaldo J.

Chapter9: Energy For Today

Section: Chapter Questions

Problem 53E: You are camping and contemplating placing some hot objects into your sleeping bag to warm it. You...

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Question

When 50 g of ethanol is heated from T1 below its freezing point to a temperature T2 above its freezing point, it absorbs 523 kJ of heat. If the same sample is cooled back from T2 until it freezes and is cooled back to T1, which of the following is true?

a. The sample releases more than 523 kJ of heat to its surroundings.

b. The sample releases less than 523 kJ of heat to its surroundings.

c. The sample releases 523 kJ to its surroundings.

d. It is impossible to know without the heat of fusion of ethanol.

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