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# When heat flows from a warm object in contact with a cool

ISBN: 9780321909107 29

## Solution for problem 3E Chapter 18

Conceptual Physics | 12th Edition

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Conceptual Physics | 12th Edition

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Problem 3E

When heat flows from a warm object in contact with a cool object, do both objects undergo the same amount of temperature change?

Step-by-Step Solution:
Step 1 of 3

ANSWER: STEP 1:- Unlike energy and entropy, temperature does not have the additive property. Suppose two objects have temperature T & T , 1nd we2brought them into contact, T +T the temperature of them will not be T + T , but it will be 1 2 . 1 2 2 After bringing into contact to these objects, the heat flows from the hotter object to the cold one. STEP 2:- Suppose T > T , so heat transfer will occur from T to T . The heat flow 1 2 1 2 continues until they both reach thermal equilibrium. After that when we measure T +T the temperature of each object, it will be 1 2. 2 The above relation tells that, the the temperature decrease in the hotter object is equal to the temperature increase in the cold object. Mathematically, T +T T 1 1 2is the temperature decrease from the hot object and 2 T 1T 2 T is the temperature increase in the cold object and these two are same, 2 2 subject to the condition that no heat is absorbed by the surrounding. CONCLUSION: Both objects undergo the same amount of temperature change.

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When heat flows from a warm object in contact with a cool