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Exercício de Química
Exercício:
Uma mistura de N2 e vapor de água foi introduzida a 20º C num recipiente que continha um agente secante. Imediatamente após a introdução da mistura, a pressão era 750mmHg. Depois de algumas horas, a pressão atingiu o valor estacionário de 735mmHg. Pedem-se
a) a composição em porcentagem molar da mistura original;
b) o volume do frasco, sabendo-se que o agente secante aumenta sua massa em 0,150g e que o volume ocupado pelo agente secante pode ser desprezado.
Informações Adicionais:
R= 62,34 mmHg · L · mol-1 · K-1
Respostas:
a) 98% de N2 e 2% de vapor de água
b) 10,14 L
Resposta A, pois se o agente secante aumenta sua massa em o,150g não daria para ele ter diminuido de 750mmHG para 73mmHG
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