Consider the PV diagram as shown above when a thermodynamic system changes its state from state a to state b. With the assumption that the system changes only in its internal energy therefore the changes in internal energy along any of the 3 paths are numerically equal. Be mindful of the directions of the arrows. When a system is taken from state a to state b along the path acb , 140 J of heat flows into the system and the system does 60 J of work. If the work done on the system is 20 J when the system returns from b to a along path bda, the amount of heat in J that is either absorbed or liberated is

Consider the PV diagram as shown above when a thermodynamic system changes its state from state a to state b. With the assumption that the system changes only in its internal energy therefore the changes in internal energy along any of the 3 paths are numerically equal. Be mindful of the directions of the arrows. When a system is taken from state a to state b along the path acb , 140 J of heat flows into the system and the system does 60 J of work. If the work done on the system is 20 J when the system returns from b to a along path bda, the amount of heat in J that is either absorbed or liberated is

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Basic Thermodynamic Processes

The word 'thermodynamics' can be divided into two words, 'thermo' and 'dynamics'. The word thermo deals with the heat and thermal phenomenon, whereas dynamics deals with forces or external agent that drives the heat flow or aids in the motion of heat.

Question

Consider the PV diagram as shown above when a thermodynamic
system changes its state from state a to state b. With the assumption
that the system changes only in its internal energy therefore the changes
in internal energy along any of the 3 paths are numerically equal. Be
mindful of the directions of the arrows.
When a system is taken from state a to state b along the path acb, 140
J of heat flows into the system and the system does 60 J of work. If the
work done on the system is 20 J when the system returns from b to a
along path bda, the amount of heat in J that is either absorbed or
liberated is
-90
O- 70
- 100
-110

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