1. The problem statement, all variables and given/known data A certain humidifier operates by raising water to the boiling point and then evaporating it. Every minute 30 g of water at 20◦ C are added to replace the 30 g that are evaporated. The heat of fusion of water is 333 kJ/kg, the heat of vaporization is 2256 kJ/kg, and the specific heat is 4190 J/kg · K. How many joules of energy per minute does this humidifier require? A. 3.0 × 104 B. 8.8 × 104 C. 7.8 × 104 D. 1.1 × 105 E. 2.0 × 104 2. Relevant equations Q=mL+mCdeltaT 3. The attempt at a solution energy per minute = (energy needed to heat water to boiling point) + (energy needed to convert liquid water to gas at the boiling point) E = (30 g)(4.190 J/g-°C)(100 - 20°C) + (30 g)(2256 J/g) E = 7.8e4 J but the correct answer is B?????