Work under constant temperature

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SUMMARY

An ideal monatomic gas undergoes isothermal expansion from 0.590 m³ to 1.25 m³ at a constant temperature of 780 K, with an initial pressure of 1.20 x 105 Pa. The work done on the gas can be calculated using the formula W = -PV, while the thermal energy transfer Q and the change in internal energy can be determined using the equations deltaU = Q - W and the ideal gas law relationship. The final pressure can be derived from the initial conditions and the volume change.

PREREQUISITES
  • Understanding of ideal gas laws and equations
  • Knowledge of thermodynamic principles, specifically isothermal processes
  • Familiarity with the concepts of work and internal energy in thermodynamics
  • Ability to manipulate equations involving pressure, volume, and temperature
NEXT STEPS
  • Calculate the final pressure using the ideal gas law and the given volumes and temperature
  • Explore the derivation of work done in isothermal processes for ideal gases
  • Study the relationship between thermal energy transfer and internal energy changes
  • Investigate real-world applications of isothermal processes in thermodynamics
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Students and professionals in physics and engineering, particularly those studying thermodynamics and gas laws, will benefit from this discussion.

ymehuuh
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Homework Statement



An ideal monatomic gas expands isothermally from 0.590 m3 to 1.25 m3 at a constant temperature of 780 K. If the initial pressure is 1.20x10^5 Pa.
(a) Find the work done on the gas.
(b) Find the thermal energy transfer Q.
(c) Find the change in the internal energy.

Homework Equations


W= -PV
deltaU=Q-W
PfVf/PiVi = Tf/Ti


The Attempt at a Solution



I know I need to find the final pressure...but I'm not sure how to.
Do I use Pf*1.35/1.2x10^5 = 780k?
 
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ymehuuh said:

Homework Statement



An ideal monatomic gas expands isothermally from 0.590 m3 to 1.25 m3 at a constant temperature of 780 K. If the initial pressure is 1.20x10^5 Pa.
(a) Find the work done on the gas.
If T is constant and PV=nRT, what is the relationship between P1V1 and P2V2? Does that help you to find P2?

AM
 

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