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Home  >>  JEEMAIN and NEET  >>  Physics  >>  Class11  >>  Kinetic Theory of Gases

An open vessel containing 3 moles of an ideal gas at $ 300 ^{\circ}$ is heated to $ 500 ^{\circ}$. What is the number of moles left after heating?

(A) 1.8 (B) 3 (C) 5 (D) 2.2

1 Answer

For an open vessel nT = constant.
Therefore, $n_1 T_1 = n_2 T_2 \rightarrow 3 \times (300 + 273) = n_2 \times (500 + 273)$
$\Rightarrow n_2 = \large\frac{3\times 573}{773} $$ \approx 2.2$
answered Mar 11, 2014 by balaji.thirumalai
 

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