One mole of methane in a piston-cylinder system undergoes an adiabatic compression from and initial state (P1 = 0.5 bar, V1 = 0.05 m3/mol) to a final state (P2 = 10 bar, V2 = 0.003 m3/mol). How much work is done on the system? %3D www

Introduction to Chemical Engineering Thermodynamics
8th Edition
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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Chapter1: Introduction
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The answer should be W~=1900j/mol

I have posted this question but can you explain how to get that value of work.I used vdw EOS

**Problem Statement:**

One mole of methane in a piston-cylinder system undergoes an adiabatic compression from an initial state (P1 = 0.5 bar, V1 = 0.05 m³/mol) to a final state (P2 = 10 bar, V2 = 0.003 m³/mol). How much work is done on the system?

**Explanation:**

- A **piston-cylinder system** is a common apparatus in thermodynamics used to analyze the behavior of gases under various processes.
- **Adiabatic compression** means that no heat is exchanged with the surroundings during the process.
- **Initial state:** When the process begins, the pressure (\(P1\)) is 0.5 bar, and the volume (\(V1\)) is 0.05 m³/mol.
- **Final state:** At the end of the process, the pressure (\(P2\)) is 10 bar, and the volume (\(V2\)) is 0.003 m³/mol. 

To determine the work done on the system during this adiabatic process, we use the formula for adiabatic processes:

\[ W = \dfrac{P1V1 - P2V2}{\gamma - 1} \]

Where \(\gamma\) (gamma) is the adiabatic index or heat capacity ratio (Cp/Cv) of methane. For methane, \(\gamma\) is approximately 1.31. 

Insert the known values into the formula to calculate the work done on the system.
Transcribed Image Text:**Problem Statement:** One mole of methane in a piston-cylinder system undergoes an adiabatic compression from an initial state (P1 = 0.5 bar, V1 = 0.05 m³/mol) to a final state (P2 = 10 bar, V2 = 0.003 m³/mol). How much work is done on the system? **Explanation:** - A **piston-cylinder system** is a common apparatus in thermodynamics used to analyze the behavior of gases under various processes. - **Adiabatic compression** means that no heat is exchanged with the surroundings during the process. - **Initial state:** When the process begins, the pressure (\(P1\)) is 0.5 bar, and the volume (\(V1\)) is 0.05 m³/mol. - **Final state:** At the end of the process, the pressure (\(P2\)) is 10 bar, and the volume (\(V2\)) is 0.003 m³/mol. To determine the work done on the system during this adiabatic process, we use the formula for adiabatic processes: \[ W = \dfrac{P1V1 - P2V2}{\gamma - 1} \] Where \(\gamma\) (gamma) is the adiabatic index or heat capacity ratio (Cp/Cv) of methane. For methane, \(\gamma\) is approximately 1.31. Insert the known values into the formula to calculate the work done on the system.
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