Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is : (1) isochoric (2) isobaric (3) isothermal (4) adiabatic

Home » Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is : (1) isochoric (2) isobaric (3) isothermal (4) adiabatic

Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is :
(1) isochoric
(2) isobaric
(3) isothermal
(4) adiabatic

Physics

Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is :
(1) isochoric
(2) isobaric
(3) isothermal
(4) adiabatic

Correct option (4)

When cock is removed, dQ = 0 for the thermally insulated system.

Because dw = 0 in vacuum

Walls that are thermally insulated

du + dw = dQ

So du also a zero.

i

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