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JEE Main202310 Apr 2023Evening ShiftChemistryThermodynamics (C)Actual

The number of endothermic process/es from the following is _______. A. I 2 ( g ) → 2 I ( g ) B. HCl ( g ) → H ( g ) + Cl ( g ) C. H 2 O ( l ) → H 2 O ( g ) D. C ( s ) + O 2 ( g ) → CO 2 ( g ) E. Dissolution of ammonium chloride in water

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Step-by-step solution

The decomposition reactions are endothermic reactions. The reactions I 2 (   g ) → 2 I ( g ) and HCl ( g ) → H ( g ) + Cl ( g ) are decomposition reactions. The heat vaporisation is an endothermic reaction. Hence, the conversion of H 2 O l → H 2 O g is endothermic process. The heat of combustion is an exothermic process. The heat involved in C ( s ) + O 2 (   g ) ⟶ CO 2 (   g ) is heat of combustion. The dissolution of ammonium chloride in water is an endothermic process. NH

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