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0.5 moles of gas A and x moles of gas B exert a pressure of 200 Pa in a container of volume \mathrm{10m^{3}} at 100 k.Given R is the gas constant in \mathrm{JK^{-1}mol^{-1}}, x is _____

Option: 1

\mathrm{\frac{2 R}{4-R}}


Option: 2

\mathrm{\frac{4-R}{2 R}}


Option: 3

\mathrm{\frac{4+R}{2 R}}


Option: 4

\mathrm{\frac{2 R}{4+R}}


Answers (1)

best_answer

From the ideal gas equation,

\mathrm{P V=\sum \cap R T}

On substituting the given values in equation (1) We get,

\mathrm{\begin{aligned} 200 \times 10 & =\left(n_A+n_B\right) \times R \times 1000 \\ 0.5+x & =\frac{2000 \times 10}{R \times 1000} \\ \frac{1}{2}+x & =\frac{2}{R} \\ x & =\frac{2}{R}-\frac{1}{2}=\frac{24-R}{2 R} \end{aligned}}

Posted by

Gautam harsolia

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