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Snow salt (KCl) mixed with water is NOT an example of a chemical reaction at all.
NOT endothermic and NOT exothermic.
WHY? A chemical reaction occurs when the chemicals you start with are different from the ones you end up with: not a state change, but an identity change.
After the KCl and water are mixed, you still have KCl and water.
This is NOT a chemical reaction.
Why does the temperature decrease?
FREEZING POINT DEPRESSION and melting point elevation often occur when substances are mixed.
In the situation described by the other respondent, the water immediately got colder when KCl was added. This is because the water was at its freezing/ melting point, in a cold room; when the water gets cold enough, it will all crystallize into a solid - frozen - crystalline matrix. BUT when the KCl (or salt, or any of a variety of substances) is added, this interferes with the crystallization process, so that more heat energy must be lost in order for the molecules to lock into their crystalline matrix. THEREFORE in that particular situation, the water was first mostly frozen with some liquid areas remaining at a low temperature...then KCl was added, and the crystals were broken apart, more able to release heat/ vibrate until a new freezing point, colder than before, is reached.
Research freezing point depression for more information.
What else can I help you with?
What percentage of hydrogen is lighter than air?
100% of hydrogen is lighter than air
When balloons are filled with this they are lighter than air?
Hot air, hydrogen or helium are lighter than cold air.
How much lighter than air is fluorine?
Fluorine is a gas at room temperature and has a molecular weight of about 19 g/mol. Compared to air, which has an average molecular weight of approximately 29 g/mol, fluorine is somewhat lighter than air. Specifically, fluorine is about 34% lighter than air. However, since it is a gas, it will still mix with air rather than rising like a lighter-than-air gas such as helium.
What are some examples of lighter than air vehicles?
-- blimp -- Zeppelin -- dirigible -- hot-air balloon
Is methane heavier than air?
Yes, methane is lighter than air. Methane gas has a molar mass of approximately 16 g/mol, which is lighter than the average molar mass of air (about 29 g/mol). This means that methane will tend to rise and disperse in the atmosphere rather than sink.
What are the three agents of chemical weathering?
water,acids and air are all agents of chemical weathering
Is ozone lighter than air?
Yes, ozone is lighter than air.
How many times lighter is hydrogen than air?
HYDROGN IS 14 TIMES LIGHTER THAN AIR.
What percentage of hydrogen is lighter than air?
100% of hydrogen is lighter than air
Is methane lighter than air?
Yes methane is lighter than air because it is less dense than air.
What are some lighter than air aircrafts?
blimp or hot air balloons are lighter than air crafts
When balloons are filled with this they are lighter than air.?
Hot air, hydrogen or helium are lighter than cold air.
Explain why lighter-than air balloons fly?
"Lighter than air." Think about it for a second.
What element is lighter than air?
There are many, but one is Helium
What is the difference between lighter than air vehicles and heavier than air vehicles?
Just, simply, Lighter than Air Vehicles are lighter than air, so that makes them fly, and Heavier than air vehicles are heavier than air, but they use airfoils on the wings to fly.
What does the the term lighter than air flying device mean?
it means that it is a flying device that is lighter than air.
What element has the chemical symbol He?
Helium has the chemical symbol He. It is a noble gas that is lighter than air and is commonly used in balloons and airships due to its low density.
