Calculate internal temperature and energy changes

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SUMMARY

This discussion focuses on calculating internal temperature and energy changes in thermodynamics, specifically addressing the principles governing internal energy variations in pure substances and ideal gases. Key statements include that the change in internal energy is solely dependent on temperature, pressure, and volume, and that the process path does not affect this change. The participants emphasize the importance of understanding these thermodynamic principles to accurately assess energy changes in various states.

PREREQUISITES
  • Understanding of the First Law of Thermodynamics
  • Familiarity with thermodynamic equilibrium states
  • Knowledge of ideal gas laws
  • Basic concepts of heat (Q) and work (W) in thermodynamic processes
NEXT STEPS
  • Study the First Law of Thermodynamics in detail
  • Learn about thermodynamic equilibrium and state functions
  • Explore the ideal gas law and its implications on internal energy
  • Investigate the relationship between heat, work, and internal energy changes
USEFUL FOR

Students and professionals in physics and engineering, particularly those specializing in thermodynamics, energy systems, and heat transfer analysis.

Pochen Liu
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Homework Statement
Calculate internal temperature and energy changes
Relevant Equations
pV = nRT
1569751972849.png
1569751831523.png
Question
1569751774116.png

(These are incorrect values)

Attempt
I used
1569751831458.png
and then found the respective change in temperature.

However for the last question I have no idea, do I sum up the net change in temperature and use
1569751972801.png

But then what is the work and how do we figure it out?
 
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Your answers to question a and b are incorrect. Please show your work.

Regarding question c, True of False:

1. The change in internal energy between two thermodynamic equilibrium states of a pure substance is a function only of the temperature, pressure, and volume of the substance in those two states.

2. If the temperature, pressure, and volume of a substance in the two states is known, the process path between these two states (as characterized by Q and W) is irrelevant to determining the change in internal energy.

3. For a given amount of an ideal gas, its internal energy depends only on its temperature (and not pressure or volume).
 
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