Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 17 - Work, Heat, and the First Law of Thermodynamics - Conceptual Questions - Page 496: 2

Answer

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Work Step by Step

a) The temperature $T$ is a state variable of a system that quantifies the hotness or the coldness” of the system. The temperature difference $\Delta T$ is used to measure the thermal interaction between two systems which is amount of heat energy that transferred between these two systems. b) Hheat $Q$ is not a state variable and hence is not a property of the system. The heat is the amount of energy that moves between the systems during a thermal interaction. c) Thermal energy $E_{th}$ is a state variable of a system that measures ​the total energy associated with the particles in a system. From all the above, temperature is a property of a system, while heat and thermal energy describe the interactions of the system with its environment. Heat is the transfer of thermal energy between two systems due to a temperature difference, and thermal energy is the total energy associated with the particles in a system
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