Question

water type dissolving time (s) average dissolving time (s) trial 1 trial 2 trial 3 room temperature water (23.9°c) 38.5 37.2 39.3 38.3 seconds hot water (50.0°c) 22.7 25.6 24.8 24.4 seconds cold water (2.1°c) 120.7 119.5 121.3 120.5 seconds which conclusion best defends loris data? the substance dissolved fastest in hot water. the substance dissolved fastest in cold water. temperature has very little effect on the dissolving time of the substance. the substance dissolved slowest in room - temperature water.

Explanation:

Looking at the average dissolving times:

• Room - temperature water (\(23.9^{\circ}C\)) has an average of \(38.3\) seconds.
• Hot water (\(50.0^{\circ}C\)) has an average of \(24.4\) seconds.
• Cold water (\(2.1^{\circ}C\)) has an average of \(120.5\) seconds.

Since \(24.4<38.3 < 120.5\), the substance dissolves fastest in hot water.

Answer:

The substance dissolved fastest in hot water.