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NEET2015PhysicsKinetic Theory of GasesActual

1 mole of H ₂ gas is contained in a box of volume V=1.00 ~m ^3 at T=300 ~K . The gas is heated to a temperature of T=3000 ~K and the gas gets converted to a gas of hydrogen atoms. The final pressure would be (considering all gases to be ideal)

Options

  1. Asame as the pressure initially
  2. B2 times the pressure initially
  3. C10 times the pressure initially
  4. D20 times the pressure initially

Correct answer

D. 20 times the pressure initially

Step-by-step solution

According to gas equation P V=n R T or P₂ V₂ T₂ = P₁ V₁ T₁ or P₂ P₁ = V₁ V₂ T₂ T₁ Here, T₂=3000 ~K , T₁=300 ~K Since H ₂ splits into hydrogen atoms, therefore volume become half i.e., V₂= 1 2 V₁ aligned & P₂ P₁ = V₁ 1 2 V₁ 3000 300 & or P₂ P₁ =20 aligned

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