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  • Q3. Three males of hydrogen molecules (taken to perigee) with two moles of helium gas are mixed. What is the molar-specific heat of the mixture at constant volume? ( <img alt="R=8.3 \mathrm{

Q3. Three males of hydrogen molecules (taken to perigee) with two moles of helium gas are mixed. What is the molar-specific heat of the mixture at constant
volume? ( R=8.3 \mathrm{~J} / \mathrm{mol} \ k)

Option: 1

17.4 \mathrm{~J} / \mathrm{mol} \ k


Option: 2

15.7 \mathrm{~J} / \mathrm{mol} \ k


Option: 3

19.7 \mathrm{~J} / \mathrm{mol} \ k


Option: 4

21.6 \mathrm{~J} / \mathrm{mol} \ k


Answers (1)

best_answer

\begin{gathered} C_{V_{1}}$ of hydrogen $=(5 / 2) R \\ C_{V_{2}} \text { of helium }=(3 / 2) R \\ C_{V} \text { of mixture }=\frac{3 \times \frac{5}{2} R+2 \times \frac{3}{2} R}{(3+2)} \\ C_{V} \text { of mixture }=17.4 \mathrm{~J} / \mathrm{mol} \ K \end{gathered}

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