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Determine the entropy change of the systems given below and their surroundings. lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
Discuss if the 2nd law is violated or not.
(a) A gas in a rigid tank is heated in a reversible process.
(b) An ideal gas with constant specific heats in a piston-cylinder device is cooled down in a reversible isobaric process.
(c) A gas in a piston-cylinder device is compressed in a reversible adiabatic process.
(d) A saturated liquid-vapor mixture in a piston-cylinder device releases heat in an irreversible isothermal process till the working fluid is a saturated liquid.