Glucose when dissolved in water leads to cooling of the solution. Suppose you take 250ml water at room temperature in an open container (such as a bowl) made of thermally insulated material and dissolve a spoonful of glucose in it. If you are able to accurately measure the heat absorbed by this solution in reaching back to room temperature (assuming negligible changes in the composition and the amount of solution during this process), you will be measuring :

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the heat capacity of the solution

the work done by the atmosphere on the system during the dissolution process

the Gibbs free energy of dissolution of the glucose in water

the enthalpy of dissolution of the glucose in water

answer is A.

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Detailed Solution

Measuring heat capacity of solution.
(Coffee cup calorimeter methodology)

$C = \frac{q_{p}}{∆ T} \cdot q_{p} = C \cdot ∆ T$

$q_{p}$ (open container under constant atmosphere pressure)

Hence we can measure the enthalpy of dissociation of the glucose in water.

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