Sunday, June 1, 2008

Why does water feel cooler when Glucose is added and stirred?

Whenever a solid is dissolved in water some energy change takes place. In most cases the amount of this change is negligible and is hardly noticeable.

But in some cases, it is quite large and leads to large changes in temperature, a rise or fall depending upon whether the heat of solution is positive or negative. Heat is absorbed when glucose is dissolved in water. As a result, the temperature drops and the solution feels cool.

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