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Classify each process as exothermic or endothermic.(a) dry

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 64P Chapter 3

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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Problem 64P

Classify each process as exothermic or endothermic.

(a) dry ice subliming (changing from a solid directly to a gas)

(b) the wax in a candle burning

(c) a match burning

Step-by-Step Solution:

Solution 64P :

Step 1:

Here, we have to classify each process if its exothermic or endothermic. First let’s see what is an endothermic and exothermic process.

        An endothermic process is a process or reaction in which the system absorbs energy from its surroundings usually in the form of heat.

        An exothermic  process is a process or reaction that releases energy from the system to its surroundings, usually in the form of heat, light (ex: a spark, flame, or flash), electricity (ex : a battery), or sound (ex: explosion heard when burning hydrogen).

Step 2 :

(a) dry ice subliming (changing from a solid directly to a gas) :

        Dry ice subliming where solid is directly changed to gas, is a reaction in which the energy from the system is absorbed as heat energy and is vapourized to gas. Hence, this reaction is an endothermic process.

Step 3 of 4

Chapter 3, Problem 64P is Solved
Step 4 of 4

Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

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Classify each process as exothermic or endothermic.(a) dry

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