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Se combinan agua lquida a 30,0C y agua lquida a 90,0C en una proporcin (1 kg de agua fra/2 kg de agua caliente). (a) Utilice

Se combinan agua lquida a 30,0C y agua lquida a 90,0C en una proporcin (1 kg de agua fra/2 kg de agua caliente). (a) Utilice un clculo simple para estimar la temperatura final del agua. Para esta parte, finja que nunca ha odo hablar de los balances de energa. (b) Ahora suponga una base de clculo y escriba un balance de energa de sistema cerrado para el proceso, despreciando los cambios de energa potencial y cintica y el trabajo de expansin y suponiendo que la mezcla es adiabtica. Utilice la balanza para calcular la energa interna especfica y por lo tanto (a partir de las tablas de vapor) la temperatura final de la mezcla. Cul es la diferencia porcentual entre su respuesta y la de la parte (a)?

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