How much energy does it take to heat 20 grams of ice to steam?

How much energy would it require to heat 20 grams of ice at -20°C to steam at 120°C?

Do the math!

a) 4800 J

b) 5600 J

c) 6400 J

d) 7200 J

Final answer:

The energy required to heat 20 grams of ice at -20°C to steam at 120°C involves calculating energy for multiple phase changes and temperature increases, considering specific heat capacities, and latent heats of fusion and vaporization.

Explanation:

The student asks how much energy is needed to heat 20 grams of ice at -20°C to steam at 120°C. To solve this, we need to calculate the energy required for each phase change and temperature change separately: heating the ice from -20°C to 0°C, melting the ice at 0°C, heating the water from 0°C to 100°C, converting the water into steam at 100°C, and heating the steam to 120°C. Each of these steps requires specific amounts of energy, determined by the specific heat capacities for ice, water, and steam, as well as the latent heat of fusion and the latent heat of vaporization.