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  • A mixture of ideal gases are taken in the mass rate of 7 :1 respectively. Molar heat capacity of the mixture at c

A mixture of ideal gases N_{2}\; and\; He are taken in the mass rate of 7 :1 respectively. Molar heat capacity of the mixture at constant pressure is .

Option: 1

2R


Option: 2

3R


Option: 3

\frac{6R}{19}


Option: 4

\frac{6R}{13}


Answers (1)

best_answer

The correct option is (2)

\left(C_{p}\right)_{m_{1} x}=\frac{n_{1} Cp_{1}+n_{2} Cp_{2}}{n_{1}+n_{2}}=\frac{\frac{7_{12}}{28}\left(\frac{7}{2} R\right)+\frac{m}{4}\left(\frac{5}{2} R\right)}{\frac{7 m}{28}+\frac{m}{4}}=\frac{\frac{1}{4}\left(\frac{7}{2} R\right)+\frac{1}{4}\left(\frac{5}{2} R\right)}{\frac{1}{4}+\frac{1}{4}}

=\frac{\frac{12}{8} R}{\frac{2}{4}}=3 R

Posted by

HARSH KANKARIA

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