One kg of a diatomic gas is at a pressure of 8 × 10(4) N/m2. The density of the gas is 4 kg/m(3). What is the energy of the gas due to its thermal motion ?
Jayant Kumar , 11 Years ago
Grade 11
2 Answers
Arun
Last Activity: 5 Years ago
For a diatomic molecular gas, internal energy per molecule is U=25NKBT PV=NKBT From equation is (i) and (ii) U=25PV Here, P=8×104Nm−2,ρ=4kgm−3, m=1kg ∴U=25×8×104×41=5×104J
Vikas TU
Last Activity: 5 Years ago
Internal energy due to thermal motion is equal to 5/2 × P × V
Mass = 1kg
Density = 4kg / m^3
Volume = 1/5 m^3
Pressure = 8 × 10^4 n/m^2
Energy = 5/2 × 1/5 × 8 × 10^4
Answer =Energy = 4 × 10^4 Joules
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