Question: Why Do You Have To Warm The Water Above Room Temperature Before Adding The Ice?

How long does it take for an ice cube to melt in room temperature water?

5-10 minutesA 1 inch ice cube, submerged in a cup of cold water would take about 15-20 minutes to melt.

In a room temperature water, it would melt in 5-10 minutes..

When performing a calorimetry experiment using water and ice Why must the ice be dried off before placing it into the calorimeter?

If the ice is not dried there will be water at zero degrees celsius. This water will contribute to the final mass of the liquid but will not gain the equivalent amount of heat the ice would gain. The initial temperature of water in the calorimeter will not drop as much thus the resulting temperature will be too high.

Why do you stir the water in a calorimeter?

Explanation: Well, so as to prevent hot-spots, and burning on the bottom of the pan. When you do a calorimetric experiment, you have a given mass of water, and you want the temperature rise of this mass to be uniform. So you stir it.

Why was the ice added to water that was warmer than room temperature?

Warm water was used to speed the melting of the ice and so that the heat exchange between the calorimeter and its contents with the environment, during the whole experiment, would be balanced. Why was dried, melting ice used?

Why doesn’t the temperature of an ice water bath increase as it absorbs heat from a classroom?

why doesn’t the temperature of an ice water bath increase as it absorbs heat from a classroom? as a solid melts slowly in its own liquid, the temperature doesn’t rise because any added kinetic energy is absorbed by the solid and converted into potential energy through melting.

What is the most important source of error in calorimeter experiments?

More reliable results can be obtained by repeating the experiment many times. The biggest source of error in calorimetry is usually unwanted heat loss to the surroundings. This can be reduced by insulating the sides of the calorimeter and adding a lid.

Why is water good in a calorimeter?

It is derived from the Latin word “calore” meaning “heat.” Water is best to use in a calorimeter because it has a high specific heat, however, other liquids such as ethanol can also be used.

What happens when an ice cube melts in a glass of water?

Since the ice, when it floats, displaces exactly its weight in water, when it melts, the water it melts into takes the same volume that the ice cube displaced in the water. So the water level should remain the same.

What happens when an ice cube is added to a soft drink?

When an ice cube is added to a soft drink, heat is transferred from the soft drink to the ice cube and so the soft drink gets colder.

Why is it important to dry the ice before adding it to the water?

If the ice is not dried there will be water at zero degrees celsius. This water will contribute to the final mass of the liquid but will not gain the equivalent amount of heat the ice would gain. The initial temperature of water in the calorimeter will not drop as much thus the resulting temperature will be too high.

What happens when you place ice in a hot drink?

When you add ice to hot water, some of the water’s heat melts the ice. The remaining heat warms the ice-cold water but cools the hot water in the process.