NEET PHYSICS- A BLOG FOR BETTER PRACTICE

     KINETIC THEORY OF GASES brief summary Bernoulli's Picture: Daniel Bernoulli, in 1738, was the primary to know atmospheric pressure from a molecular point of view. He drew an image of a vertical cylinder, closed at rock bottom , with a piston at the highest , the piston having a weight thereon , both piston and weight being supported by the atmospheric pressure inside the cylinder. He described what went on inside the cylinder as follows: “let the cavity contain very minute corpuscles, which are driven hither and thither with a really rapid motion; in order that these corpuscles, once they strike against the piston and sustain it by their repeated impacts, form an elastic fluid which can expand of itself if the load is removed or diminished…” Sad to report, his insight, although essentially correct, wasn't widely accepted. Most scientists believed that the molecules during a gas stayed more or less in situ , repelling one another from a distance, held somehow wi...