Physics: Expansion at constant pressure

AI Thread Summary
To solve the problem of an ideal monoatomic gas expanding at constant pressure, the ideal gas law PV=nRT is applied. The pressure is converted from atm to N/m², and the initial volume is adjusted from m³ to liters for calculations. The number of moles (n) is determined using the initial conditions, but the user reports consistent incorrect results. It is emphasized to carefully track units throughout the calculations to ensure they are consistent and correct. The discussion highlights the importance of unit conversion and proper application of the ideal gas law in solving thermodynamic problems.
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Homework Statement



An unknown number of moles of an ideal monoatomic gas expand reversibly from Vi = 2.30 m3 to Vf = 3.10 m3, at a constant pressure of 1.71 atm and an initial temperature of 300 K.
Find the number of moles of gas.
Find the final temperature of the gas K.
Calculate the work done by the gas.

Homework Equations



I'm using PV=nRT

The Attempt at a Solution



Converting the pressure in atm to N/m^2 and m^3 to L. I'm using the initial volume for V, 8.315 for R and the initial temp in K and solving for n. I keep getting the same answer and it is coming up wrong. Please help!
 
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Write out all the units during your calculation. Do the units make sense in the end? Also, this isn't advanced physics.
 

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