During the discharge process, is the temperature of the gas leaving the turbine less than, equal to, or greater than the temperature of the gas leaving tank A at the same instant?

Two nonconducting tanks of negligible heat capacity and of equal volume initially

contain equal quantities of the same ideal gas at the same T and P. Tank A discharges

to the atmosphere through a small turbine in which the gas expands isentropically;

tank B discharges to the atmosphere through a porous plug. Both devices operate until

discharge ceases.

(a) When discharge ceases, is the temperature in tank A less than, equal to, or greater

than the temperature in tank B?

(b) When the pressures in both tanks have fallen to half the initial pressure, is the

temperature of the gas discharging from the turbine less than, equal to, or greater

than the temperature of the gas discharging from the porous plug?

(c) During the discharge process, is the temperature of the gas leaving the turbine less

than, equal to, or greater than the temperature of the gas leaving tank A at the same

instant?

(d) During the discharge process, is the temperature of the gas leaving the porous plug

less than, equal to, or greater than the temperature of the gas leaving tank B at the

same instant?

(e) When discharge ceases, is the mass of gas remaining in tank A less than, equal to,

or greater than the mass of gas remaining in tank B?

Solution: