Question: One kg of methane is contained in a piston/cylinder device at 0.8 MPa and 250C. It undergoes a reversible isothermal expansion to 0.3 MPa. Methane

One kg of methane is contained in a piston/cylinder device at 0.8 MPa and 250°C. It undergoes a reversible isothermal expansion to 0.3 MPa. Methane can be considered an ideal gas under these conditions. How much heat is transferred?

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