Making solutions can generate or release heat. I've never noticed a change in the solution volume when adding water to sugar, so I will assume the process isn't very endothermic or exothermic.
I wanted to check in which water sugar dissolves faster, but it turned out that I have no sugar at home. It's amazing, I completely forgot that I don't drink hot drinks with sugar. To be honest, I don't even understand people who drink coffee with sugar. Maybe it's because they drink bad coffee? I buy k cups on sale and I love the taste of coffee so much that I don't even want to add milk or sugar.
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