5 moles of an ideal gas at 293 K is expanded isothermally from 2.1 MPa to 1.3 MPa against a constant external pressure of 4.3 MPa. The heat transferred in this process is .

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Question

5 moles of an ideal gas at 293 K is expanded isothermally from 2.1 MPa to 1.3 MPa against a constant external pressure of 4.3 MPa. The heat transferred in this process is  .

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Canvas Classes · Accepted Answer

Strategy:
 For an isothermal expansion of an ideal gas, the internal energy change is zero (). By the First Law of Thermodynamics, any heat transferred () must equal the work done by the system on the surroundings ().

Step 1: Identify process conditions
- Isothermal: .
- Calculation: .

Step 2: Calculate Initial and Final Volumes
Using :
- 
-

Step 3: Calculate Heat Transferred ()

.

Step 4: Express per mole
Heat per mole .

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