A Short History of the Progress of Scientific Chemistry in Our Own Times
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On this series of observations Andrews was able to base an interesting distinction between a "gas"- 246 A SHORT HISTORY OF THE and a " vapour," terms whicli up to this time had been used in an uncertain and arbitrary way.
"Ether," he says, "in the state of gas is called a vapour, while sulphurous acid in the same state is called a gas ; yet they are both vapours, the one derived from a liquid boiling at 35°, the other from a liquid boiling, at — 10°. . . . Many of the, properties of vapours dep...end on the gas and liquid being present in contact with one another, and this we have seen can only occur at temperatures below the critical point. We may accordingly define a vapour to be a gas at any temperature under its critical point. ... If this definition be accepted, carbonic acid will be a vapour below 31°, a gas above that temperature ; ether a vapour below 200°, a gas above that temperature." The most important deduction from the results of these experiments, then, supplies a clear explanation of the difficulty encountered in attempting the liquefaction of the six exceptional gases.
What to read after A Short History of the Progress of Scientific Chemistry in Our Own Times?
You can find similar books in the "Read Also" column, or choose other free books by Tilden, William A. (William Augustus), Sir, 1842-1926 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
On this series of observations Andrews was able to base an interesting distinction between a "gas"- 246 A SHORT HISTORY OF THE and a " vapour," terms whicli up to this time had been used in an uncertain and arbitrary way.
"Ether," he says, "in the state of gas is called a vapour, while sulphurous acid in the same state is called a gas ; yet they are both vapours, the one derived from a liquid boiling at 35°, the other from a liquid boiling, at — 10°. . . . Many of the, properties of vapours dep...end on the gas and liquid being present in contact with one another, and this we have seen can only occur at temperatures below the critical point. We may accordingly define a vapour to be a gas at any temperature under its critical point. ... If this definition be accepted, carbonic acid will be a vapour below 31°, a gas above that temperature ; ether a vapour below 200°, a gas above that temperature." The most important deduction from the results of these experiments, then, supplies a clear explanation of the difficulty encountered in attempting the liquefaction of the six exceptional gases.
What to read after A Short History of the Progress of Scientific Chemistry in Our Own Times?
You can find similar books in the "Read Also" column, or choose other free books by Tilden, William A. (William Augustus), Sir, 1842-1926 to read onlineMoreLess
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