The calories needed to change 10 grams of ice at zero degrees C to steam at 100 degrees C is
A) 6200.
B) 7200.
C) 6400.
D) 8000.
E) None of the above choices are correct.

Question

Quizplus · Accepted Answer

To convert ice at 0°C to steam at 100°C, you need to account for the heat required to melt the ice, raise the temperature of the water, and then vaporize it. The calculation is: 10g * 80 cal/g (melting) + 10g * 100 cal/g (heating) + 10g * 540 cal/g (vaporizing) = 7200 cal.

The Calories Needed to Change 10 Grams of Ice at Zero