Isobaric Expansion for Ideal Gas

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The discussion focuses on calculating the final temperature of an ideal gas during isobaric expansion from an initial state defined by a pressure of 30 psi, a volume of 2 ft³, and a temperature of 20°C. The pressure remains constant during the expansion, and the final volume is specified as 3 ft³. Participants clarify that the initial state can be used to determine the number of moles, allowing for the application of the ideal gas law to find the final temperature. The relationship between the initial and final states is confirmed using the equation nR = P1V1/T1 = P2V2/T2. This discussion emphasizes the importance of understanding the ideal gas law in the context of isobaric processes.
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Given: working fluid is an Ideal gas

P=30 psi
V=2ft3
T=20degreeC

Q. what is initial state of the gas when?

Isobaric expansion to 3ft3
 
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Isn't what they gave you the initial state of the gas?
 
ok finial state--sorry
 
Since the expansion is isobaric, the pressure stayed the same. They also specified the final volume, so all you need is the final Temperature. You already know the initial states for PiVi = nRTi (except for the moles); the final temperature in PfVf = nRTf can be found by setting the moles of the initial state and the moles of the final state equal to each other.
 
I throught is was

PiVi/Ti = P2V2/T2 ?
 
Windseaker said:
I throught is was

PiVi/Ti = P2V2/T2 ?

P1V1 = nRT1
P2V2 = nRT2

nR = P1V1/T1 = P2V2/T2
 

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