United States or Niue ? Vote for the TOP Country of the Week !
As long ago as 1858, Kirchhoff, by attributing to saline solutions that is to say, to mixtures of water and a non-volatile liquid like sulphuric acid the properties of internal energy, discovered a relation between the quantity of heat given out on the addition of a certain quantity of water to a solution and the variations to which condensation and temperature subject the vapour-tension of the solution.
To state precisely the other relations, we must admit, in addition, the experimental laws discovered by Pfeffer. But without any hypothesis it becomes possible to demonstrate the laws of Raoult on the lowering of the vapour-tension and of the freezing point of solutions, and also the ratio which connects the heat of fusion with this decrease.
Word Of The Day