IGNOU BCHCT 133 2026 - Two molecule of condense in enzyme catalyzed reaction

Question

Two molecule of $\alpha-D-\text{glucose}$ condense in enzyme catalyzed reaction to give a molecule of disaccharide, maltose. Calculate the enthalpy of the reaction. The enthalpies of combustion of crystalline $\alpha-D-\text{glucose}$ and maltose at $25\text{ }^\circ\text{C}$ are $-2809.1\text{ kJmol}^{-1}$ and $5645.5\text{ kJmol}^{-1}$ , respectively.

19 Jan 2026

Answer :

Word Count : 196

The condensation of two molecules of α-D-glucose to form one molecule of maltose is represented as 2 α-D-glucose → maltose + H₂O. The enthalpy change of this reaction can be obtained using Hess’s law by comparing the enthalpies of combustion of

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