(a) Suppose a 500 resistor is immersed in an oil bath. The oil bath is kept at a constant temperature of 25°C and constant pressure of 1 atm. An experiment is performed, where a current of 75mA is made to flow in the resistor for 30s. Find the entropy change of the resistor and of the oil bath. [Hint: assume that at the beginning and end of the experiment, the temperature of the resistor is equal to that of the oil bath. The heat per unit time produced by an electrical component with resistance R, while current I is flowing through it, is Q/At = I? R] (b) Now suppose that instead of the resistor being placed in an oil bath, the resistor is thermally insulated (you enclose it in an adiabatic wrapping). The resistor has a mass of 4g and the material from which it is made has a specific heat at constant pressure of 750 J/kg/K. The other parameters for the experiment are the same as in part (a). What is the change in entropy of the resistor, assuming its volume change is negligible during the experiment? (c) The experimenter in Part (a) has extra supplies of oil sitting in the lab. Suppose there are two rigid containers of oil, which are in thermal contact with each other but completely isolated from the environment. Suppose the entropy of the oil in a container is given by the experimentally-determined approximation: S = a V(n v U) where a is an experimentally-determined constant for the oil. The second container has twice as many moles of oil (n), and three times the internal energy (U), as the first container. Find the (approximate) ratio of the volumes of the systems.
(a) Suppose a 500 resistor is immersed in an oil bath. The oil bath is kept at a constant temperature of 25°C and constant pressure of 1 atm. An experiment is performed, where a current of 75mA is made to flow in the resistor for 30s. Find the entropy change of the resistor and of the oil bath. [Hint: assume that at the beginning and end of the experiment, the temperature of the resistor is equal to that of the oil bath. The heat per unit time produced by an electrical component with resistance R, while current I is flowing through it, is Q/At = I? R] (b) Now suppose that instead of the resistor being placed in an oil bath, the resistor is thermally insulated (you enclose it in an adiabatic wrapping). The resistor has a mass of 4g and the material from which it is made has a specific heat at constant pressure of 750 J/kg/K. The other parameters for the experiment are the same as in part (a). What is the change in entropy of the resistor, assuming its volume change is negligible during the experiment? (c) The experimenter in Part (a) has extra supplies of oil sitting in the lab. Suppose there are two rigid containers of oil, which are in thermal contact with each other but completely isolated from the environment. Suppose the entropy of the oil in a container is given by the experimentally-determined approximation: S = a V(n v U) where a is an experimentally-determined constant for the oil. The second container has twice as many moles of oil (n), and three times the internal energy (U), as the first container. Find the (approximate) ratio of the volumes of the systems.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
Related questions
Question
![(a) Suppose a 500 resistor is immersed in an oil bath. The oil bath is kept at a constant temperature of
25°C and constant pressure of 1 atm. An experiment is performed, where a current of 75mA is made to
flow in the resistor for 30s. Find the entropy change of the resistor and of the oil bath.
[Hint: assume that at the beginning and end of the experiment, the temperature of the resistor is equal
to that of the oil bath. The heat per unit time produced by an electrical component with resistance R,
while current I is flowing through it, is Q/At = I ² R]
(b) Now suppose that instead of the resistor being placed in an oil bath, the resistor is thermally
insulated (you enclose it in an adiabatic wrapping). The resistor has a mass of 4g and the material from
which it is made has a specific heat at constant pressure of 750 J/kg/K. The other parameters for the
experiment are the same as in part (a). What is the change in entropy of the resistor, assuming its
volume change is negligible during the experiment?
(c) The experimenter in Part (a) has extra supplies of oil sitting in the lab. Suppose there are two rigid
containers of oil, which are in thermal contact with each other but completely isolated from the
environment. Suppose the entropy of the oil in a container is given by the experimentally-determined
approximation:
S = a V(n v U)
where a is an experimentally-determined constant for the oil. The second container has twice as many
moles of oil (n), and three times the internal energy (U), as the first container. Find the (approximate)
ratio of the volumes of the systems.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc0a416aa-90b7-478f-8c7c-e07ad14a269e%2Fa9809496-cc21-410c-a56a-349b8db91bc8%2Fh012jt_processed.jpeg&w=3840&q=75)
Transcribed Image Text:(a) Suppose a 500 resistor is immersed in an oil bath. The oil bath is kept at a constant temperature of
25°C and constant pressure of 1 atm. An experiment is performed, where a current of 75mA is made to
flow in the resistor for 30s. Find the entropy change of the resistor and of the oil bath.
[Hint: assume that at the beginning and end of the experiment, the temperature of the resistor is equal
to that of the oil bath. The heat per unit time produced by an electrical component with resistance R,
while current I is flowing through it, is Q/At = I ² R]
(b) Now suppose that instead of the resistor being placed in an oil bath, the resistor is thermally
insulated (you enclose it in an adiabatic wrapping). The resistor has a mass of 4g and the material from
which it is made has a specific heat at constant pressure of 750 J/kg/K. The other parameters for the
experiment are the same as in part (a). What is the change in entropy of the resistor, assuming its
volume change is negligible during the experiment?
(c) The experimenter in Part (a) has extra supplies of oil sitting in the lab. Suppose there are two rigid
containers of oil, which are in thermal contact with each other but completely isolated from the
environment. Suppose the entropy of the oil in a container is given by the experimentally-determined
approximation:
S = a V(n v U)
where a is an experimentally-determined constant for the oil. The second container has twice as many
moles of oil (n), and three times the internal energy (U), as the first container. Find the (approximate)
ratio of the volumes of the systems.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 3 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Recommended textbooks for you
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning
University Physics (14th Edition)
Physics
ISBN:
9780133969290
Author:
Hugh D. Young, Roger A. Freedman
Publisher:
PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:
9781107189638
Author:
Griffiths, David J., Schroeter, Darrell F.
Publisher:
Cambridge University Press
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning
University Physics (14th Edition)
Physics
ISBN:
9780133969290
Author:
Hugh D. Young, Roger A. Freedman
Publisher:
PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:
9781107189638
Author:
Griffiths, David J., Schroeter, Darrell F.
Publisher:
Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:
9781337553278
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:
9780321820464
Author:
Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:
Addison-Wesley
College Physics: A Strategic Approach (4th Editio…
Physics
ISBN:
9780134609034
Author:
Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:
PEARSON