Sapling Learning The temperature of water in a solution before and after perform

Question

Sapling Learning The temperature of water in a solution before and after performing an experiment can be used to study the heat impact of aqueous reactions or processes. Based on the reported temperature change of the water or solution, determine the direction of heat flow between the system and the surroundings in the following processes Click in the box to toggle the direction of the arrow. If there is no net heat flow in either direction, leave the box blank. An aqueous solution of acid has a starting temperature of 20.7°C. After adding a solution of base, the temperature of the mixture rises to 23.0 System Surroundings During the process of dissolving an unknown solid into water, the temperature of the solution drops by 2.0°C System Surroundings An aqueous solution of an ionic compound has a starting temperature of 20.7°C. After adding another aqueous solution at the same temperature, the temperature of the mixture remains at 20.7°C System Surroundings Previous Give Up & View Solution Check Answer Next Exit Hint

Explanation / Answer

1. if base is added to an acid, and its temperature increases from 20.70c to 230c, the heat flows from

surroundings to system

2. if the temperature of the solution drops

then heat flows from system to surroundings

3. if there is no change in temperature during process, no heat is absorbed or eveolved from the system.

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