The internal energy of one gram of helium at 100 K and one atmospheric

1.	The internal energy of one gram of helium at 100 K and one atmospheric pressure is:
Answer» 100 J 1200 J 300 J 500 J. Solution :The helium MOLECULE is monatomic and hence internal energy per molecule is `(3)/(2)kT.` The energy per mole is THEREFORE is `(3)/(2) RT`. One gram of helium is one fourth mole and hence its energy is `(1)/(4)xx(3)/(2)Rxx100=300 J`, taking the value of R to be approximtaely 8J/mole-K. Thus CORRECT CHOICE is (c ).

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The internal energy of one gram of helium at 100 K and one atmospheric pressure is:

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