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AP EAMCET2013ChemistryStates of Matter

At T( ~K ) , the ratio of kinetic energies of 4 ~g of H ₂(g) and 8 ~g of O ₂(g) is

Options

  1. A1: 4
  2. B4: 1
  3. C2: 1
  4. D8: 1

Correct answer

D. 8: 1

Step-by-step solution

KE = 3 2 R T for 1 mole of the gas. 4 ~g of H ₂ gas has 2 moles of H ₂ It has 2 times KE as compared to 1 mole of gas But 8 ~g of O ₂ gas has 1 / 4 moles of O ₂ ; It has one fourth part of the KE as compared to 1 mole of gas. Hence, ratio of KE of H ₂ and O ₂ KE _ H ₂ : KE _ O ₂ =2: 1 4 =8: 1

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