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March 27, 2017

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Which of the following desceriptions about ideal gas is/are correct?

1)An ideal gas obeys Boyle's law only under high temp and low pressure

2)the molecules of an ideal gas have no size

3)the internal energy of an ideal gas consists of kinetic energy only

A.1)only B.3)only
C.1)&2) D.2)&3)

THE ANS IS D but not 1,2,3 are correct,why?

  • Physics - ,

    1) nonsense

    2) nonsense

    3) Yes

  • Whoops - ,

    1. is wrong by definition. An ideal gas obeys the ideal gas laws

    2 is correct because the molecules of an IDEAL gas are considered POINT masses

    3 is correct because internal energy depends only on temperature, how fast the molecules move.

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