I am anxious not to make a mistake in this Rossi summary. I would appreciate it if a few people would double-check the following:
Heat capacity of water (4.2 kJ/kgK) Heat of vaporization of water (2260 kJ/kg): To vaporize 1 kg of water starting at 13°C Temperature change 87°C Energy to bring water to 100°C: 87°C*4.2*1 kg = 365 kJ Energy to vaporize water: 2260*1 = 2,260 kJ Total: 2,625 kJ I realize that is approximate. The heat capacity changes with higher temperatures. A steam table would probably give a somewhat different answer, in Btu. Use 2.2 lbs. For steam-table mavens, in the Rossi experiment steam is at 1 atm, temperature measured at 101°C, and it is dry. - Jed
