JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
Consider the reaction
\(2\text{H}_2\text{S}(g) + 3\text{O}_2(g) \rightarrow 2\text{H}_2\text{O}(l) + 2\text{SO}_2(g)\)
The magnitude of enthalpy change for the reaction in kJ mol\(^{-1}\) is ________. (Nearest integer)
Given: \(\Delta_fH^{\ominus}(\text{H}_2\text{S}) = -20.1\) kJ mol\(^{-1}\)
\(\Delta_fH^{\ominus}(\text{H}_2\text{O}) = -286.0\) kJ mol\(^{-1}\)
\(\Delta_fH^{\ominus}(\text{SO}_2) = -297.0\) kJ mol\(^{-1}\)
- A 1123
- B 1126
- C 1128
- D 1130
Answer & Solution
Correct Answer
(B) 1126
Step-by-step Solution
Detailed explanation
The standard enthalpy of reaction is given by: \(\Delta_r H^{\ominus} = \sum \Delta_f H^{\ominus}(\text{products}) - \sum \Delta_f H^{\ominus}(\text{reactants})\) For the given reaction:…
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