150 G of Liquid Nitrogen at Its Boiling Point of 77.0

question 21

Multiple Choice

150 g of liquid nitrogen at its boiling point of 77.0 K is stirred into a beaker containing 510 g of 18.0°C water.If the nitrogen leaves the solution as soon as it turns to gas,how much water freezes? The heat of vaporization of nitrogen is 48.0 cal/g and that of water is 80.0 cal/g.

• A)none
• B)21 g
• C)42 g
• D)11 g
• E)63 g

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