NEET2026ChemistryChapterActual
The potential energy profile for a hypothetical reaction X Y is shown in the given figure. Based on the graph, what is the enthalpy change ( H ) for this reaction?
Options
- A+50 kJ mol ⁻¹
- B-50 kJ mol ⁻¹
- C+110 kJ mol ⁻¹
- D+150 kJ mol ⁻¹
Correct answer
A. +50 kJ mol ⁻¹
Step-by-step solution
From the given potential energy profile: Enthalpy of reactant X , H_X = 40 kJ mol ⁻¹ Enthalpy of product Y , H_Y = 90 kJ mol ⁻¹ The enthalpy change ( H ) for the reaction is given by the difference in potential energy between the products and the reactants: H = H_ products - H_ reactants H = H_Y - H_X H = 90 - 40 = +50 kJ mol ⁻¹ Answer: +50 kJ mol ⁻¹