The enthalpy of reaction is maximum in D. All have same value . Therefore ,D. All have same value is correct .
The enthalpy of reaction is a measure of the heat energy absorbed or released during a chemical reaction.
It is represented by the change in enthalpy, ΔH. In this case, we're looking for the reaction with the maximum enthalpy change.
The enthalpy change for a reaction can be influenced by the strength of the bonds broken and formed during the reaction.
Generally, stronger bonds release more energy when formed and require more energy to break. Ionic bonds tend to be stronger than covalent bonds.
Looking at the given reactions:
A. NaOH + HCl → NaCl + H2O (ionic and covalent bonds)
B. NaOH + HF → NaF + H2O (ionic and covalent bonds)
C. NaOH + HBr → NaBr + H2O (ionic and covalent bonds)
All three reactions involve the breaking and forming of both ionic and covalent bonds.
Without specific bond enthalpy values, it's challenging to determine the exact enthalpy changes for each reaction.
Given the information provided, we cannot definitively say which reaction has the maximum enthalpy change.
Therefore, the correct answer is D. "All have the same value." However, if more information about bond enthalpies is provided, it may be possible to make a more specific determination.