# Joint Entrance Examination/AIEEE 2009/Q072 ENERGY

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| Original Question by 164.100.170.4 Here's the question... Q72. One kg of diatomic gas is at a pressure of 8 × 104 N/m2. The density of the gas is 4 kg/m3. What is the energy of the gas due to its thermal motion? (1) 5 × 104 J (2) 6 × 104 J (3) 7 × 104 J (4) 3 × 104 J Posted by 164.100.170.4 05:06, 24 September 2009 (UTC) Post a reply! | What's Up? Latest discussions on the forum Modern-Physics-Help Joint Entrance Examination/2000 Screening/Q006 Bohr model of an atom applied to an atom with some hypothetical particle Joint Entrance Examination/2000 Screening/Q001 X Ray Tungsten filament and electrons Joint Entrance Examination/2000 Screening/Q025 Various energies of an electron in bohr model Joint Entrance Examination/2000 Screening/Q022 Radioactive materials and decay constant User:Thewinster/HHF/Modern-Physics-Preload Physics-Help User:Thewinster/Sandbox/Forum-Watch User:Thewinster/Sandbox Joint Entrance Examination/AIEEE 2009/Q083 youngs modulus Joint Entrance Examination/2000 Screening/Q012 Rotating particle with charge q mass m Joint Entrance Examination/2000 Screening/Q017 Electrostats - energy of a configuration |
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Reply to the thread, posted by 164.100.170.4
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Additional notes
SOLUTION:[1]
E= [f/2]PV f=degree of freedoms.For diatomic gas under normal temp.f=5 [3-translation,2-vibration]
E=5/2 PV
=5/2P*m/ρ
=[5*8*10$^4$*1]/[2*4]
=5*10$^4$ J
These comments, along with the notes on the left, were contributed by 164.100.170.4 05:16, 24 September 2009 (UTC) :