iran-konkur 2024 Q91

iran-konkur · Other · konkur-riazi_1403_ordibehesht_specialized Not Maths
91-- From burning a quantity of carbon, gases CO and CO$_2$ are formed. Considering the following reactions, if 5.6 liters of gas CO is formed at STP conditions, and a total of 201.5 kilojoules of energy is released, how many grams of carbon are consumed in reaction (II)? $(C = 12\ \text{g.mol}^{-1})$
\begin{align*} \text{I)}\ \ 2\text{C(s)} + \text{O}_2\text{(g)} &\rightarrow 2\text{CO(g)}, \Delta H = -564\ \text{kJ} \text{II)}\ \ \text{C(s)} + \text{O}_2\text{(g)} &\rightarrow \text{CO}_2\text{(g)}, \Delta H = -393\ \text{kJ} \end{align*}
(1) 8(2) 6(3) 4(4) 15

\textbf{91--} From burning a quantity of carbon, gases CO and CO$_2$ are formed. Considering the following reactions, if 5.6 liters of gas CO is formed at STP conditions, and a total of 201.5 kilojoules of energy is released, how many grams of carbon are consumed in reaction (II)?\\
$(C = 12\ \text{g.mol}^{-1})$

\begin{align*}
\text{I)}\ \ 2\text{C(s)} + \text{O}_2\text{(g)} &\rightarrow 2\text{CO(g)}, \quad \Delta H = -564\ \text{kJ}\\
\text{II)}\ \ \text{C(s)} + \text{O}_2\text{(g)} &\rightarrow \text{CO}_2\text{(g)}, \quad \Delta H = -393\ \text{kJ}
\end{align*}

\begin{tabular}{cccc}
(1) 8 & (2) 6 & (3) 4 & (4) 15
\end{tabular}

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