JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
The standard entropy change for the reaction \(4 Fe ( s )+3 O _{2}( g ) \rightarrow 2 Fe _{2} O _{3}( s )\) is \(-550\, JK ^{-1}\) at \(298 \,K\). [Given : The standard enthalpy change for the reaction is \(-165\, kJ\, mol ^{-1}\). The temperature in \(K\) at which the reaction attains equilibrium is ... . (Nearest Integer)
- A \(30\)
- B \(300\)
- C \(210\)
- D \(670\)
Answer & Solution
Correct Answer
(B) \(300\)
Step-by-step Solution
Detailed explanation
\(\Delta G =\Delta H - T \Delta S =0\) at equilibrium \(\Rightarrow-165 \times 10^{3}- T \times(-505)=0\) \(\Rightarrow T =300\, K\)
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