How many calories must be added to 3 g of ice at 0°C to convert it to water vapor at 100°C?
A) 180 calories
B) 540 calories
C) 720 calories
D) 1440 calories
E) 2160 calories

Question

Quizplus · Accepted Answer

To convert ice at 0°C to water vapor at 100°C, you need to consider the heat required for melting the ice, heating the water, and vaporizing it. The calculations are:  1. Melting ice: 3 g * 80 cal/g = 240 cal  2. Heating water: 3 g * 100°C * 1 cal/g°C = 300 cal  3. Vaporizing water: 3 g * 540 cal/g = 1620 cal  Total = 240 + 300 + 1620 = 2160 calories.

How Many Calories Must Be Added to 3 G of Ice