Trying to work out isothermal heat transfer

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SUMMARY

The discussion focuses on calculating heat transfer for a gas mass of 0.115 kg that expands from 0.25 m³ to 0.56 m³ at an initial temperature of 32°C and pressure of 1.2 bar. The relevant equations include the work done during expansion, expressed as W = P1V1 ln(V2/V1), and the heat transfer equation Q = U2 - U1 + W. The user successfully solved the problem after initial attempts, demonstrating the application of thermodynamic principles in isothermal processes.

PREREQUISITES
  • Understanding of the ideal gas law (PV = mRT)
  • Familiarity with thermodynamic equations for work and heat transfer
  • Knowledge of logarithmic functions in the context of gas expansion
  • Basic principles of isothermal processes in thermodynamics
NEXT STEPS
  • Study the derivation of the ideal gas law and its applications
  • Learn about isothermal and adiabatic processes in thermodynamics
  • Explore the concept of internal energy (U) and its calculation
  • Investigate the role of pressure and volume in gas behavior using real gas equations
USEFUL FOR

This discussion is beneficial for students in thermodynamics, engineers working with gas systems, and anyone interested in understanding heat transfer in isothermal conditions.

abbie230391
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Homework Statement


A gas mass 0.115kg undergoes an increase in volume from 0.25m cubed to 0.56m cubed. initial temp 32 degrees c and initial pressure 1.2bar. work out heat transfer??


Homework Equations


W=P1V1 ln(V2/V1)
W=mRT ln(V2/V1)
P1V1/T1=P2V2/T2
Q=U2-U1+W
PV=mRT


The Attempt at a Solution


loads but non worked
 
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It doesn't matter if you didnt get the answer. Still show us how you tried it.
 
its ok i worked it out now
 

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