Ideal Gas with Polytropic Process (1 of 2) | First Law | Thermodynamics (updated)

Welcome to Engineering Hack! In today's video we are solving the part 1 of a Thermodynamic's problem. We have a polytropic process where Argon is being compressed in a piston-cylinder device, and we want to determine the work done and the heat transferred during this compression process. The problem requires you to know the first law of thermodynamic that tell us that the change of internal energy will be the combination of the heat and the work being done by the system or to the system, also some other pure properties, such as the definition of work and some relationships between volume and pressure. Everything else comes by analyzing the problem and the system at hand.

🙏 Special shout out to @kieranzinn3843 for pointing out the error in our previous video! We appreciate your keen eye and feedback. Thank you!

Problem statement: Argon is compressed in a polytropic process with n = 1.2 from 120 kPa and 10ºC to 800 kPa in a piston-cylinder device. Determine the work done and the heat transferred during this compression process.

Answer:
(a) 108.9 kJ/kg
(b) 76.2 kJ/kg (On part 2)

Ideal Gas:

In this video:
00:00 Intro
00:24 Problem statement
00:50 Problem analysis
07:19 Finding V2
09:03 Finding T2
11:30 Deducing work equation
17:06 Finding work

🎓 Can you trust the answers and solutions provided? Well, you never should trust anything 100%. Make sure you are checking for yourself. When I’m solving the questions, I always solve on my own and then check the results against other sources. If there is divergence, I look for more sources. So while I can’t promise you everything will be 100% correct, I can promise I’ve done my due diligence before posting. If you enjoyed this video, please press the bell 🔔, like 👍, comment or share.

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