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Mechanical Properties Of Solids

Question
CBSEENPH11020358
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One kg of a diatomic gas is at a pressure of 8 × 104 N/m2 . The density of the gas is 4 kg/m-3. What is the energy of the gas due to its thermal motion?

  • 3 × 104 J

  • 5× 104 J

  • 6× 104 J

  • 7× 104 J

Solution

B.

5× 104 J

Thermal energy corresponds to internal energy
Mass = 1 kg
density = 8 kg/m3
Volume space equals space mass over density space equals space 1 over 8 straight m cubed Pressure space equals space 8 space straight x space 10 to the power of 4 space straight N divided by straight m squared Therefore comma space Internal space Energy space equals space 5 over 2 space space straight P space straight x space straight V space equals space 5 space straight x 10 to the power of 4 space straight J

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