An insulated rigid tank is divided into two equal parts by a partition. initially, one part contains 4 kg of an ideal gas at 850 kpa and 40°c, and the other part is evacuated. the partition is now removed, and the gas expands into the entire tank. determine the final temperature and pressure in the tank. (round the final answers to the nearest whole number.)

final pressure is = 425 kPa

Explanation:

Allowing ideal gas to expand in whole tank, therefore resisiting force in this process is zero. thus work done si also zero. considering ideal gas as system , there is no heat transefer during process of expansion.

Assuming : the gas act like ideal gas, change in kinetic and potential energy is negligible

from 1 st law we have

By taking consideration of above assumption we get

i.e.

from ideal gas equation we hvae

as internal energy remain same in both state therefore temperature remain same

as we knwo that

therefore we have

        = 425 kPa