How much energy is absorbed when 15g of water at 100C boiled away?

∴ Q = m·ΔHv = 15g x 540 cals/g = 8100 calories = 33,890 joules

Explanation:

Phase transition formula => Q = m·ΔHv

Q = amount of heat absorbed

ΔHv = Heat of vaporization = 540 cal/g = 25,594 joules/g at 100°C

m = mass of substance = 15 grams

∴ Q = m·ΔHv = 15g x 540 cals/g = 8100 calories = 33,890 joules

there all right good

explanation:

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