why does a gas fill the entire available space......
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a gas fills the entire space available because it has high kinetic energy and less intermolecular force...hope this helps you
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Gases exert pressure against anything around them, because of something called Brownian motion: every particle is moving in a random direction with a speed based on temperature.That "anything" includes other parts of the gas volume. Now, if they don't fill up all of the available space, there is zero pressure exerted on one side, while there is nonzero positive pressure exerted on all others. The net result is pressure towards the empty volume.
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