Two cylinders \( A \) and \( B \) of equal capacity are connected to each other via a stopcock. \( A \) contains an idea…

Two cylinders \( A \) and \( B \) of equal capacity are connected to each other via a stopcock. \( A \) contains an ideal gas at standard temperature and pressure. \( B \) is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. The process is

[NEET 2020]