A piston cylinder device initially contains 0.2m^(3) neon (assume ideal ) at 200kPa inside at T_(1) ""^(@)C. A valve is now opened and neon is allowed to escape until the volume reduces to half the initial volume. At the same time heat transfer with outside at T_(2) ""^(@)C ensures a constant temperature inside. Select correct statement(s) for given process

A piston cylinder device initially contains 0.2m^(3) neon (assume idea

1.	A piston cylinder device initially contains 0.2m^(3) neon (assume ideal ) at 200kPa inside at T_(1) ""^(@)C. A valve is now opened and neon is allowed to escape until the volume reduces to half the initial volume. At the same time heat transfer with outside at T_(2) ""^(@)C ensures a constant temperature inside. Select correct statement(s) for given process
Answer» `Delta U` must be zero `Delta U` can not be zero Q MAY be +ve q may be -ve Solution :Mass TRANSFER `RARR Delta U ne 0`, P const, `V darr` To maintain constant `T, q gt 0`