Capítulo 12 - Mistura de gases ideais e psicometria

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Presentation transcript:

Capítulo 12 - Mistura de gases ideais e psicometria

12.1 - Descrevendo a composição da mistura fi = fração mássica do gás i n = núm de mols da mistura ni = núm. de mols do gás i yi = fração molar do gás i

m,n Peso molecular aparente da mistura

12.2 - Relacionando p, V e T pressão parcial do gás i 8.314 [J/kmol.K] pressão parcial do gás i n = núm de mols da mistura ni = núm. de mols do gás i yi = fração molar do gás i

volume parcial do gás i yi = fração molar do gás i

12.3 - Avaliando U, H, S, cp e cv [J] [J]=[kmol].[J/kmol]

[J/K] [J/K]=[kmol].[J/kmol.K] [J/kmol.K]

12.3 - Analisando sistemas [J] [J]

Capítulo 13 - Misturas reagentes e combustão Fundamentos da combustão Reagentes -> Produtos Combustível + oxidante -> Produtos 1 H2 + 0,5 O2 -> 1 H2O x CH4 + y (O2 + 3,76 N2 ) -> z CO2 + w H2O + O2 a CH4 + b (O2 + 3,76 N2 ) -> c CO2 + d H2O + e O2 + f N2

Conservação da energia: C + O2 -> CO2 Conservação da energia: Entalpia de formação do CO2 -393,5 kJ/mol de CO2

C : 1 = y O : 2 x = 2 y + z H : 4 = 2 z y=1 x = y + z/2 = 2 z=2 CH4 + x O2 -> y CO2 + z H2O CH4 + 2 O2 -> CO2 + 2 H2O PCI = 50.020 [kJ/kg] PCS = 55.510 [kJ/kg]