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AP EAMCET2009ChemistryStates of Matter

The average kinetic energy of one molecule of an ideal gas at 27^ C and 1 ~atm pressure is

Options

  1. A900 cal K ⁻¹ ~mol ⁻¹
  2. B6.21 10⁻²¹ JK ⁻¹ molecule ⁻¹
  3. C336.7 JK ⁻¹ molecule ⁻¹
  4. D3741.3 JK ⁻¹ ~mol ⁻¹

Correct answer

B. 6.21 10⁻²¹ JK ⁻¹ molecule ⁻¹

Step-by-step solution

Average kinetic energy per molecule = 3 2 k T or = 3 2 R N₀ T aligned & = 3 2 8.314 6.023 10²³ 300 & =6.21 10⁻²¹ JK ⁻¹ molecule ⁻¹ aligned

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