1 atm and 101deg. C are sufficient to produce only or mostly dry steam? Harry
> >From: Jed Rothwell <[email protected]> >To: [email protected] >Sent: Sun, January 16, 2011 5:49:09 PM >Subject: [Vo]:Please double-check energy required to vaporize water > > >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 > >
