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JEE Main Chemistry question

ChemistryThermodynamicsJEE Main

The entropy change for the reaction will be [Given that, , , ] **[AMU 2005]**

Answer: (A)

Solution

\Delta S^\circ = 2S^\circ(HCl) - [S^\circ(H_2)+S^\circ(Cl_2)] = 2(187)-(131+223) = 374-354 = 20\ JK^{-1}mol^{-1}. This matches option (a).

Question ID VK-134750