A piston confines 0.100 mol Ar(g) in 1.00 L at 25 C. Two experiments are performed. (a) The gas is allowed to expand through an additional 1.00 L against a constant pressure of 1.00 atm. (b) The gas is allowed to expand reversibly and isothermally to the same final volume. Which process does more work?A piston confines 0.100 mol Ar(g) in 1.00 L at 25 C. Two experiments are performed. (a) The gas is allowed to expand through an additional 1.00 L against a constant pressure of 1.00 atm. (b) The gas is allowed to expand reversibly and isothermally to the same final volume. Which process does more work?
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Los Altos High, Los AltosENGLISHENGLISH WriEg reversible isothermal expansion of an ideal gas P ex V nRT const constant
Eg reversible isothermal expansion of an ideal gas p
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E.g. reversible, isothermal expansion ofan ideal gasPexV = nRTconst= constant- Work done is the area beneath the ideal gas isothermlying between the initial and the final volumes.
2013 General Chemistry I12EXAMPLE 7.2A piston confines 0.100 mol Ar(g) in a volume of 1.00 L at 25oC. Twoexperiments are performed. (a) The gas is allowed to expand throughan additional 1.00 L against a constant pressure of 1.00 atm. (b) Thegas is allowed to expand reversibly and isothermally to the samefinal volume. Which process does more work?(a) Irreversible path:(b) Reversible path:
2013 General Chemistry I13Self-Test 7.2AA