Conversations on Chemistry

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: Mrs. E. Because they part only with a portion of hat heat, and therefore they suffer only a diminution if their liquidity. Emily. Yet they appear as. perfectly liquid as they lid before they were mixed. Mrs. B. They are however considerably conden- yed. I shall repeat the experiment in a graduated, ube,...
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: Mrs. E. Because they part only with a portion of hat heat, and therefore they suffer only a diminution if their liquidity. Emily. Yet they appear as. perfectly liquid as they lid before they were mixed. Mrs. B. They are however considerably conden- yed. I shall repeat the experiment in a graduated, ube, and you will see that the two liquids, when mix-: d, occupy less space than they did separately. This, ube is graduated by cubit inches, and this little mea- mre contains exactly one cubit inch; therefore, if I ill it twice, and pour its contents into the tube, they should fill it up to the second mark. Caroline. And so they do exactly. Mrs. B. Because I put two measures of the same liquid into the tube; but we shall now try it with one of water and one of sulphuric acid; observe the difference? Emily. The two measures, this time, evidently take up less space, though the fluid does not appear to have suffered any change in its liquidity. Mrs. B. The two liquids, however, have undergone some degree of condensation from the new arrangement of their particles; they have penetrated each other, so as to form a closer substance, and have thus, as it were, squeezed out a portion of their latent heat. But this change of state is certainly much less striking, and less complete, than when liquids are converted into solids. The slakeing of lime is another curious instance of the extrication of latent heat. Have you never observed how quick-lime smokes when water is poured upon it, and how much heat it produces ? Caroline. Yes; but I do not understand what change of state takes place m the lime that occasions its giving out latent heat; for the quick-lime, which is solid, is (if I recollect right) reduced to powder by this operation, and is therefore rather ex...