A mixture of two moles of hydrogen and one mole of argon gas is taken in a closed container at room temperature. Consider the following two statements
(i) The average kinetic energy of each molecule of H2 and Ar are the same.
(ii) The partial pressure due to argon gas is more than that due to hydrogen gas.

Question

A mixture of two moles of hydrogen and one mole of argon gas is taken in a closed container at room temperature. Consider the following two statements

(i) The average kinetic energy of each molecule of H2 and Ar are the same.

(ii) The partial pressure due to argon gas is more than that due to hydrogen gas.

TestHub · Accepted Answer

K avg ​ = 2 5 ​ k T for H 2 ​ but 2 3 ​ k T for Ar, so (i) is incorrect. Partial pressure p ∝ n : with 2 moles H 2 ​ and 1 mole Ar , p H 2 ​ ​ > p A r ​ , so (ii) is also incorrect.

Physics - Heat & Thermo Question with Solution | TestHub

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