An ideal gas mixture has the following stoichiometric analysis Component % by ma

Question

An ideal gas mixture has the following stoichiometric analysis Component % by mass N2 40 CO2 10 CO 13 O2 17 H2 08 CH4 12 Find the analysis on a volume basis. What is the volume of 1 kg of this gas when the P = 1.5 MPa and T = 30 degree C? Find the specific heats at 300 K. Using Table A.2 This mixture undergoes an expansion isentropic process from 2.0 bar, 130 degree C to 1 MPa. Find T2. Find Delta sm per kg of mixture when the mixture is compressed isothermally from 0.1 MPa to 0.2 MPa. All the gases are supplied in separate lines at 0.2 MPa and 300 K to a mixing chamber and are mixed adiabatically. The resulting mixture has the composition as given in Part (A). Determine the entropy change due to the mixing process per unit mass of mixture.

Explanation / Answer

THE MOLES OF COMPOUNDS IN IT

NO2= 28/40=1.39
C02= 44/10=4.4
CO=28/13=2.17
O2=32/12=1.87
H2=8/2=4
CH4=16/12=1.33

TOTAL MOLES=15.17

CALCULATING PERCENTAGE OF ;
NO2= (1.4)/(15.17)*100 = 9.23%

WHICH GIVES ANALYSIS ON VOLUME BASIS


we have total mass=156 grams
given, m= 1kg
no of moles=1000/156

P1= 1.5Mpa= 1.5*1000pa
R=8.314
t=303k

using, pv=nrt
1.5*1000*v=1000/156*8.314*303

v=10.76litres

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