There are 270 Calories in a Hershey's® Milk Chocolate bar. The following data might be useful: ΔHvap = 43.9 kJ/mol, ΔHfusion = 6.02 kJ/mol, ΔHsublimation = 49.9 kJ/mol, specific heat of ice = 2.05 J g-1°C-1, specific heat of water = 4.18 J g-1°C-1, and specific heat of steam = 2.08 J g-1°C-1. Assume the specific heat of water does not change with temperature. (Density of ice = 0.920 g/mL).
|How much energy is used up at each step of the heating, including heating the solid, melting, heating the liquid, and vaporization?|
If all of the energy in the bar were used to heat up 75.0 mL of ice at -25.0 °C, how hot would the water get?
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