One kilomole of an ideal gas is throttled from an initial

Home » Thermodynamics » Thermodynamics Miscellaneous » Question

One kilomole of an ideal gas is throttled from an initial pressure of 0.5 MPa to 0.1 MPa. The initial temperature is 300 K. The entropy change of the universe is

1. 13.38 kJ/K
2. 4014.3 kJ/K
3. 0.0446 kJ/K
4. 0.0445 kJ/K

Correct Option: A

Throttling, T_i = T_f
Hence

ds = RIn	P_i
	P_f

= 8.314In	0.5
	0.1

8.314 ln 5
(ds) = 13.388 kJ/K