MHT CET · Chemistry · Thermodynamics (C)
What is the quantity of heat evolved when \(6 \mathrm{~g}\) carbon combines with sulphur to form \(\mathrm{CS}_{2}\) according to the reaction \(\mathrm{C}+\mathrm{S}_{2} \rightarrow \mathrm{CS}_{2} \quad \Delta \mathrm{H}=-92 \mathrm{KJ} \mathrm{mol}^{-1}\)
- A \(22 \mathrm{KJ}\)
- B \(32 \mathrm{KJ}\)
- C \(46 \mathrm{KJ}\)
- D \(11 \mathrm{KJ}\)
Answer & Solution
Correct Answer
(C) \(46 \mathrm{KJ}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{C}+\mathrm{S}_{2} \longrightarrow \mathrm{CS}_{2}\)
\(\Delta \mathrm{H}=-92 \mathrm{~kJ} \mathrm{~mol}^{-1}\) (Endothermic reaction)
For \(12 \mathrm{~g} \mathrm{C}\), heat evolved \(=92 \mathrm{~kJ}\)
\(\therefore\) For \(6 \mathrm{~g} \mathrm{C}\), heat evolved \(=46 \mathrm{~kJ}\)
\(\Delta \mathrm{H}=-92 \mathrm{~kJ} \mathrm{~mol}^{-1}\) (Endothermic reaction)
For \(12 \mathrm{~g} \mathrm{C}\), heat evolved \(=92 \mathrm{~kJ}\)
\(\therefore\) For \(6 \mathrm{~g} \mathrm{C}\), heat evolved \(=46 \mathrm{~kJ}\)
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