An adiabatic tank of negligible heat capacity and 1 mº volume is connected to a pipeline containing steam at 10 bar and 200°c, filled with steam until the pressure equilibrates, and disconnected from the pipeline. how much steam is in the tank at the end of the filling process and what is its temperature if the following occurs: (a) the tank is initially evacuated. (b) the tank initially contains steam at 1 bar and 150°c. the answers are: a) 321°c, 3.73 kg fya; b) 301°c, 3.87 kg

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.