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vitfil [10]
3 years ago
8

An ice-skating rink has tubes under its floor to freeze the water. salt water is cooled well below the freezing point of water a

nd pumped through the tubes to freeze the water in the rink. why can the salt water be cooled so low without freezing? f salt has a very low freezing point. g adding salt to water lowers its freezing point. h the salt water is constantly absorbing energy from its surroundings. j movement of the salt water through the tubes keeps it in the liquid state.
Chemistry
1 answer:
alex41 [277]3 years ago
6 0
Correct Answer: Option g: <span>adding salt to water lowers its freezing point

Reason:
Freezing point is a colligative property. When a non-volatile solution is present in solution, it's freezing point decreases. This is referred as depression in freezing point (</span>ΔTf<span>). Extent of lowering in freezing point is dependent on number of particles present in system. Mathematically it is expressed as:

</span>ΔTf = Kf X m
<span>
where, m = molality of solution
Kf = cryoscopic constant. 

Hence, a</span><span>dding salt to water lowers the freezing point of solution.</span> 
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