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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 9, Problem 4SC
Textbook Problem
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Which of the following would release more heat upon cooling from 50°C to 25°C : a 5-kg rock or a 5-kg jug of water?

5-kg rock

5-kg jug of water

none of the above (they would both release the same amount of heat).

Interpretation Introduction

Interpretation:

The one among the given options that would release more heat upon cooling from 50°C to 25°C is to be identified.

Concept introduction:

Heat is transferred between two objects when they have a difference in temperature. If the difference of temperature between a cold object and a hot object is large, the flow of heat will also be large.

The amount of heat energy required to change the temperature of a certain amount of a particular substance by 1°C is known as its heat capacity.

Explanation of Solution

Reason for the correct option:

A higher amount of heat is released by the jug of water because the heat capacity of water is higher than that of a rock. More energy is required to warm the water, due to which more energy is released when the cooling of water takes place. Therefore, a jug of water is preferred over a rock.

Hence, option (b) is correct...

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Chapter 9 Solutions

Chemistry In Focus
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