BacEvo Thur W20 UPDATED1.pdf - Name Group University of Calgary Department of Physics and Astronomy PHYS 223 Winter 2020 Labatorial 8 The First Law of

BacEvo Thur W20 UPDATED1.pdf - Name Group University of...

This preview shows page 1 - 4 out of 11 pages.

Name: Group #: University of Calgary Department of Physics and Astronomy PHYS 223, Winter 2020 Labatorial 8: The First Law of Thermodynamics Overview: In this labatorial you will explore the first law of thermodynamics, which relates the change in the thermal energy of a system to the work done and heat flow as the system undergoes some process. You will apply the first law to an ideal gas to calculate the work done in various processes. Next you will use a computer simu- lation to examine the behaviour and properties of the ideal gas. Finally you will apply these concepts to study an ideal gas as it undergoes a cyclic process. This figure shows the first law of thermodynamics and 4 possible processes for an ideal gas. Not pic- tured here is an isobaric (constant pressure) process. Pre-Lab Reading: Sections 18.5-18.6, 19.1-19.4 of “Physics for Scientists and Engineers,” R. D. Knight, 4th Ed. Please complete Checkpoint 1 (page 2-4) prior to the lab. Your TA will check if you have Checkpoint 1 filled-in and grant you entry to the lab based on that. Equipment: The “Gas Properties” simulation, developed by the PhET Interactive Simulations Project at the University of Colorado, . Distributed under the Creative Commons-Attribution 3.0 license. 1
Image of page 1
PHYS 223, Labatorial 8, Winter 2020 The First Law of Thermodynamics The relation between heat, work, and thermal energy in a thermodynamic process is given by the First Law of Thermodynamics: Δ E th = W + Q, (1) where E th is the thermal (often called internal) energy of the system, W is the work done on the system, and Q is the heat transferred into the system. Under the sign convention, W is negative when work is done by the system on the environment, and Q is negative when heat flows out of the system into the environment. Question 1 : Why is there a Δ in front of the symbol for thermal energy, but not for the work or the heat? Question 2 : State the content of the first law in words. Question 3 : Is it correct to say that a thermodynamic system in a given state contains a certain amount of thermal energy? Explain your answer. Page 2 of 11
Image of page 2
PHYS 223, Labatorial 8, Winter 2020 Question 4 : Is it correct to say that a thermodynamic system in a given state contains a certain amount of heat or work? Explain your answer.
Image of page 3
Image of page 4

You've reached the end of your free preview.

Want to read all 11 pages?

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes