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  • What will be the magnitude of work done when at <img alt="\mathrm{STR,\ 3.2 \mathrm{~g}}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7BSTR%2C%5C%203.2%20%5Cmathrm%7B%7Eg%7D%7D"

What will be the magnitude of work done when at \mathrm{STR,\ 3.2 \mathrm{~g}} of oxygen is expanded to occupy for times its original volume?

Option: 1

\mathrm{538.39\ cal}


Option: 2

\mathrm{1041.23\ cal}


Option: 3

\mathrm{2353.33\ cal}


Option: 4

\mathrm{1649.4\ cal}


Answers (1)

best_answer

At \mathrm{STP, \ 32 \mathrm{~g}\ \ \mathrm{O}_2} or \mathrm{1} mole \mathrm{{O}_2} will occupy 22.7 \mathrm{~L} volume.
\mathrm{\therefore\ if\ volume\ is\ 4\ times,}
\mathrm{\begin{aligned} V_2-V_1 & =90.8-22.7 \\ & =68.1 \mathrm{~L} \end{aligned}}
Now,
\mathrm{ \\\\ \begin{aligned} \omega & =P\left(V_2-V_1\right) \\ & =1(68.1)=68.1 \mathrm{L\ atom} \\ & =68.1 \times 24.22\ \mathrm{cal} \\ & =1649.38\ \mathrm{cal} \end{aligned}}

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shivangi.shekhar

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