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Collisions are perfectly elastic

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Total translational kinetic energy of a mole of a monatomic gas is given by 3/2 RT

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The collisions are negligible amongst t

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Molecular movement causes the pressure exerted by a gas

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the transfer of kinetic energy between molecules is heat.

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Molecules undergo elastic collisions with other molecules and the walls but otherwise exert no forces on each other.

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T is proportional to the mean kinetic energy

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Avogadro's Constant is the number of particles per mole
(6.02x10^23)

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The number of molecules is large but the separation between the molecules is large with respect to their molecular sizes

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Pressure is inversely proportionaal to volume in a gas

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Boyles law

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Brownian motion
(Random motion of particles)

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the gas is composed of a large number of identical molecules moving in random directions, separated by distances that are large compared with their size

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Molecules move randomly in a distribution in speeds which does not change

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1. all the molecules of a particular gas are equal

2. collisions between molecules and their container are completely elastic

3. collisions between molecules themselves are completely elastic

4. the size of actual molecules is negligible compared to molecular separation

5. the laws of Newtonian mechanics apply

6. extremely large numbers of molecules mean that statistical methods can be applied

7. between collisions molecules move in straight lines at constant speed

8. the motion of molecules is random

9. gravitational effects are negligible

10. the time for each collision is negligible

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PV=NkT, where R is the molar gas constant and k is the Boltzmann constant

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Molecules obey Newton's Laws of Motion