Total Heat Flow Calculation for Isothermal Expansion of Diatomic Gas

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Homework Help Overview

The problem involves calculating the total heat flow for an isothermal expansion of a diatomic gas, with specific initial and final volumes, pressure, and a subsequent temperature change at constant volume.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the use of the Q=-W formula for isothermal processes and express uncertainty about calculating work (W). There is mention of using graphical methods to find integrals, but concerns are raised about the relevance of certain provided information.

Discussion Status

The discussion is ongoing, with participants exploring different approaches to the problem. Some guidance has been offered regarding the assumptions of reversible expansion and the algebraic representation of work done, but no consensus has been reached.

Contextual Notes

Participants are navigating the constraints of the problem, including the requirement to adhere to forum rules about showing attempts at solutions and the implications of the temperature change on the calculations.

brandonmm1
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Homework Statement



n = 3.8-mol of diatomic gas is allowed to expand isothermally from Vini = 1.9-m3 to Vfin = 10.5-m3. The initial pressure is Pini = 1.38-atm. After this the gas is raised at a constant volume by a temperature ΔT = 35-K. Calculate the total heat flow into the gas.

Homework Equations

The Attempt at a Solution

 
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Please show your attempt at a solution (forum rules).
 
CWatters said:
Please show your attempt at a solution (forum rules).
I tried to use the Q=-W formula for isothermal. But I don't know how to find the W. Other than that, I also tried to use the graph and find the integral, but in using the graph some of the information given is not used(temperature)
 
Assuming that the expansion is carried out reversibly, what is your algebraic result for the amount of work that is done?
 

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