Unit 55 Ko2 + P Part (O2)

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72 PSATP = P part(O2) + P part(CO2) + P part(N2) P part(N2) = PSATP - P part(O2) - P part(CO2) P part(N2) = 101.3 kPa – 79 kPa – 0.75 kPa = 21.55 kPa Answer: P part(N2) = 21.55 kPa 73 PV=nRT n = PV/RT P = 2500 kPa V = 12 L R = 8.314 J/mol*K T = 22 + 273.15 = 295.15 K n = (2500000*12*10-3m3)/ (8.314 J/mol*K*295.15 K) = 12.22 mol. Answer: n = 12.22 mol. 74 C3H8 + 4O2 => 3CO2 + 2H2O n (O2) = 3.5 mol * 4 = 14 mol PV = nRT V(O2) = nRT/P V(O2) = (14 mol * 8.314 J/mol*K *(28 + 273.15) K) / 1.013 * 105 Pa V(O2) = 0.3311 m3 = 331.1 L Answer: V(O2) = 331.1 L 75 PV=nRT n = PV/RT n = (1.013*105 Pa * 65 * 10-3 m3) / (8.314 J/mol*K * 298 K) = 2.65 mol Answer: n = 2.65 mol 76 PV=nRT n = PV/RT n = (1.013*105 Pa * 7.5 * 10-3 m3) / (8.314 J/mol*K * 298 K)

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