Thermo dynamics gas process question help
Air contained in an upright piston/cylinder arrangement is compressedfrom an initial pressure of 10 atm. and volume of 0.42m3 to a finalpressure of 25 atm. If the atmospheric pressure is 1.013 bar and thecylinder contains 5kg of air, find the final temperature, the work done andthe heat transfer if the expansion occurs:
Isothermally,
Polytropically with an index of expansion of 1.3,
Isentropically with = 1.4.
I know and have derived the relevant equations for the work done for each process i.e. for isothermal W=P1V1ln(P2/P1) and W = mRTln(P2/V2)
However using these equations I'm getting the work done to be 3.85KJ....I'm not converting the atm units into pascals and wondering if I should be doing this? Can anyone check if this is correct?
Isothermally,
Polytropically with an index of expansion of 1.3,
Isentropically with = 1.4.
I know and have derived the relevant equations for the work done for each process i.e. for isothermal W=P1V1ln(P2/P1) and W = mRTln(P2/V2)
However using these equations I'm getting the work done to be 3.85KJ....I'm not converting the atm units into pascals and wondering if I should be doing this? Can anyone check if this is correct?
Quick Reply
Related discussions
- what degree should I do to become a petroleum engineer
- Help with University choices
- GCSE Chemistry Triple Science
- What is the best university for engineering area?
- Paper 3 edexcel 2023 gas prices question
- London College of Fashion MBA (1 year )
- Website for Aero, Thermo
- EPQ help tribes / indigenous
- AS level chemistry Isaac Physics help please
- AQA Environmental science paper 2
- AQA GCSE Chemistry Paper 2 Higher Tier (8462 2H) - 13th June 2023 [Exam Chat]
- Rusty thermos drinkable?
- SQA Nat 5 Mathematics - Paper 1 Non-calculator - 3rd May 2024 [Exam Chat]
- Chemical engineering
- chem help
- I'm autistic ask me anything
- OCR A-Level Chemistry- Amounts of Substance- The Ideal Gas Equation
- Adiabatic or isothermal process?
- A level Chemistry
- [Chemistry] Gases Question
