-maltose can be hydrolysed to glucose according to the following reaction:

The standard enthalpy of formation of , and are and , respectively. Which of the following statement(s) is/are true?

Question

$\alpha$-maltose can be hydrolysed to glucose according to the following reaction:
$\alpha ext{-C}_{12} ext{H}_{22} ext{O}_{11} ext{(aq)} + ext{H}_2 ext{O(l)} o 2 ext{C}_6 ext{H}_{12} ext{O}_6 ext{(aq)}$
The standard enthalpy of formation of $ ext{H}_2 ext{O(l)}$, $ ext{C}_6 ext{H}_{12} ext{O}_6 ext{(aq)}$ and $\alpha ext{-C}_{12} ext{H}_{22} ext{O}_{11} ext{(aq)}$ are $-285, -1263$ and $-2238 ext{ kJ/mol}$, respectively. Which of the following statement(s) is/are true?

Prashant Kotian · Accepted Answer

Correct answer: A,B. . As it is negative, it is exothermic. Applying Hess's law to combustion evaluates the heat of maltose combustion as 3 kJ less than the combustion of 2 moles of glucose.

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