Answer:
Generally, a solute dissolves faster in a warmer solvent than it does in a cooler solvent because particles have more energy of movement. For example, if you add the same amount of sugar to a cup of hot tea and a cup of iced tea, the sugar will dissolve faster in the hot tea.
My answer:
sugar dissolves more quickly in warm coffee because it's hot, it dissolves easily in hot coffee but it will take time to mix with cold iced tea.