Adiabatic Expansion: Solving for Pressure and Volume

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SUMMARY

The discussion focuses on solving for pressure and volume in adiabatic expansion, specifically using the equation PVγ = K, where γ is 5/3. A participant encountered a calculation error when multiplying 101,000 Pa by (1.5 m3)5/3, resulting in a value of 151,500 Pa·m5 instead of the expected 199,000 Pa·m5. The correct calculation involves determining Vγ as 1.55/3 = 1.97, which is crucial for accurate results in thermodynamic problems.

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bobsmith76
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Homework Statement



see attachment





The Attempt at a Solution



I'm having trouble where they multiply (101,000 by 1.5 m3)5/3

I get 151,500 Pa*m5
not 199,000 Pa*m5
 

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bobsmith76 said:

Homework Statement



see attachment

The Attempt at a Solution



I'm having trouble where they multiply (101,000 by 1.5 m3)5/3

I get 151,500 Pa*m5
not 199,000 Pa*m5
The adiabatic condition is:

[itex]PV^\gamma = K[/itex] which means [itex]P^1 \times V^\gamma = K[/itex]

Since [itex]\gamma = 5/3[/itex], and V = 1.5, [itex]V^\gamma = 1.5^{5/3} = 1.97[/itex]

AM
 

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