John Dalton 4

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the Manchester Literary and Philosophical Society and in the same year he published his first book: Meteorological Observations and Essays. In his book Dalton stated that gas exits and acts independantly and purely physically not chemically. After six years of tutoring, John resigned to conduct private research while still doing tutoring at 2 shillings a lesson. In 1802 John stated his law of partial pressures. When two elastic fluids are mixed together ( A and B) they dont repel each other. A particles do not repel B particles but a B particle will repel another B particle. One of his experiments involved the addition of water vapor to dry air. The increase in pressure was the same as the pressure of the added water. By doing this experiment, John established a relationship between vapor pressure and temperature. John’s interest in gases arose from his studies of meteorology. He had weather equipment that was with him at all times and he was constantly studying ...

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