Total Heat Flow Calculation for Isothermal Expansion of Diatomic Gas

AI Thread Summary
The discussion focuses on calculating the total heat flow for an isothermal expansion of a diatomic gas. The problem involves 3.8 moles of gas expanding from 1.9 m³ to 10.5 m³ at an initial pressure of 1.38 atm, followed by a temperature increase of 35 K at constant volume. Participants are attempting to apply the Q = -W formula for isothermal processes but are struggling to determine the work done (W). There is mention of using graphical methods to find the integral, but some provided data, such as temperature, seems underutilized. The conversation emphasizes the need for a clear approach to calculating work in reversible expansion scenarios.
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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.

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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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