$(10 - x)\, litre$ $\to$ $C_2H_6$ ; mole of $C_2H_6$$ = (10-x)/22.4$
$ = \,\,\frac{x}{{22.4}}\,\, \times \,\,894\,\, + \,\,\frac{{(10\, - \,\,x)}}{{22.4}}\,\, \times \,\,1500$
ઉત્સર્જન ઉષ્મા $ = \,\,\frac{x}{{22.4}}\,\, \times \,\,894\,\, + \,\,\frac{{(10\, - \,\,x)}}{{22.4}}\,\, \times \,\,1500$
$474.6\,\,\, = \,\,\frac{x}{{22.4}}\,\, \times \,\,894\,\, + \,\,\frac{{(10\, - \,\,x)}}{{22.4}}\,\, \times \,\,1500$
$x\,\, = \,\,0.745,\,\,\,\,\,\% C{H_4}\, = \,\,74.5\,\% \,$ અને $\% \,{C_2}{H_6}\,\, = \,\,25.5\,\% $
$H_2O$ $_{(l)}$ $\rightleftharpoons$ $H_2O$ $_{(g)}$ [$1$ વાતા દબાણે] $[ \Delta S = 120 \,JK^{-1}$ અને $\Delta H = +45.0\, KJ ]$