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Un dispositivo de cilindro - mbolo , de carga constante y equipado con una resistencia el ctrica , contiene 1 0 kg de vapor saturado

Un dispositivo de cilindro-mbolo, de carga constante y equipado con una resistencia elctrica, contiene 10 kg de vapor saturado de refrigerante 134a, a 240 kPa. La resistencia se encuentra conectada a un suministro de voltaje de 110 V y se mantiene encendida por 12 min. En el mismo perodo, el refrigerante pierde 300 kJ de calor. Determine la corriente aplicada para que la temperatura final sea 70\deg C.

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