A Group of Explorers in the Antarctic Can Obtain the Water

question 22

Multiple Choice

A group of explorers in the Antarctic can obtain the water they need only by melting snow.How much heat does it take for them to make a cup of coffee (100 g water at 100ºC) ? Assume that the snow has an initial temperature of -40ºC; that the latent heats of fusion and vaporization of water are,respectively,333.5 kJ/kg and 2257 kJ/kg; and that the specific heats of ice (snow) and water are,respectively,2.05 kJ/kg · K and 4.18 kJ/kg · K.

• A)33 kJ
• B)50 kJ
• C)75 kJ
• D)83 kJ
• E)310 kJ

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