A 55 g piece of aluminum at 21 degc is cooled to -196 degc, Ask an Expert

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A 55 g piece of aluminum at 21 °C is cooled to -196 °C by placing it in a large container of liquid nitrogen at that temperature. How much nitrogen is vaporized?

(Assume that the specific heat of aluminum is constant and is equal to 0.90 kJ/kg ·K and that the vaporized nitrogen's temperature does not change.)

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