Problem 4 A flow process receives two streams (A and B) that contain mixtures of methane and

ethane and produces a stream of pure methane (C) and a stream of pure ethane (D). All streams

may be considered ideal gas mixtures with heat capacities, 35 and 53 J/mol K, for methane and

ethane, respectively. Information about the system is given in the table below.

a) Fill out the missing entries on this table. For enthalpy and entropy, use as reference state the

pure components in the ideal gas state at 1 bar, 300 K.

b) Calculate the ideal work for this process.

Molar flow rate of methane

(mol/min)

Molar flow rate of ethane

(mol/min)

Mole fraction of methane

Mole fraction of ethane

P (bar)

T(K)

H (kJ/min)

S (kJ/K/min)

A

10

5

250

B

20

10

600

C

80

0

2

300

D

0

75

1

350