College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Question 6
Is the following statement true or false?
The change in entropy of an object undergoing an adiabatic process can be positive or negative.
O True
False
QUESTION 6
A copper block at 100 °C is placed into thermal contact with a copper block at 10 °C. They equilibrate to
55 °C. Both have heat capacity of 150 J K1. Calculate AStot (J K1).
Do not include units in your answer.
Write the numerical value in normal form.
QUESTION 7
Water (1 kg) at 20 °C is placed in contact with a 50 °C reservoir. After it equilibrates, it is placed in contact
with a 100 °C reservoir until it equilibrates. Calculate AStot (in kJ K, note units) of the process. Let
Cwater
4.2 kJ/kg-K.
Do not include units in your answer.
Write the numerical value in normal form.
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Transcribed Image Text:Is the following statement true or false? The change in entropy of an object undergoing an adiabatic process can be positive or negative. O True False QUESTION 6 A copper block at 100 °C is placed into thermal contact with a copper block at 10 °C. They equilibrate to 55 °C. Both have heat capacity of 150 J K1. Calculate AStot (J K1). Do not include units in your answer. Write the numerical value in normal form. QUESTION 7 Water (1 kg) at 20 °C is placed in contact with a 50 °C reservoir. After it equilibrates, it is placed in contact with a 100 °C reservoir until it equilibrates. Calculate AStot (in kJ K, note units) of the process. Let Cwater 4.2 kJ/kg-K. Do not include units in your answer. Write the numerical value in normal form.
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