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  4. Assuming fully decomposed, the volume of CO2 released at STP on heating 9.85 g of BaCO3 (at. mass of Ba = 137 ) will be

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Q. Assuming fully decomposed, the volume of $CO_2$ released at STP on heating $9.85\, g$ of $BaCO_3$ (at. mass of $Ba = 137$ ) will be

AIPMTAIPMT 2000Some Basic Concepts of Chemistry

Solution:

On decomposition, $BaCO _{3}$ liberates $CO _{2}$ as
$ \underset{197\, g}{BaCO _{3}} \longrightarrow BaO +\underset{22.4\, L \text{at STP}}{CO_2}$
$\because 197\, g \text { of } BaCO _{3} $ gives $=22.4 \, L \text { of } CO _{2} $ at STP
$\therefore 9.85\, g \text { of } BaCO _{3} $ will give $=\frac{22.4 \times 9.85}{197}=1.12 \, L$