22g of CO2 are compressed isothermally and reversibly at 298 K from an initial pressure of 100 kPa when the work obtained is 1.2 kJ. find the final pressure
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>4.4 × 10^-2 kg of CO2 are ...
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4.4×10
−2
kg of CO
2
are compressed isothermally and reversibly at 293 K from 50kPa when the work obtained is 1.245 kJ. Find the final pressure. (R=8.314J/K).
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Answer
Amount of CO
2
=4.4×10
−2
kg
Number of mole of CO
2
n
Co
2
=
44
4.4×10
−2
×10
3
=1 mole
work done in isothermal pracess
W
iso
=2.303 RTlog
10
V
1
V
2
=2.303 RTlog
10
P
2
P
1
1.245×10
3
=2.303×8.3×293log
10
P
2
P
1
log
10
dfracP
1
P
2
=
2.303×8.3×293
1295
log
10
P
2
P
1
=0.22229
P
2
P
1
=1.668
1.668
50 kPa
=P
2
⇒P
2
=29.77=30
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