Question

Calculate the change in the entropies of the system and the surroundings, and the total change in entropy, when the volume of a sample of nitrogen gas of mass 28 g at 298 K and 1.00 bar increases from 1.20 dm3 to 5.00 dm3 in (a) an isothermal reversible expansion, (b) an isothermal irreversible expansion against pex = 0, and (c) an adiabatic reversible expansion.

Answer 1

Answer:

c...

Explanation:

An adiabatic process is one in which no heat enters or leaves the system, and hence, for a reversible adiabatic process the first law takes the form dU = − PdV. Thus for a reversible adiabatic process and an ideal gas, CVdT = −PdV. ...