When pressure is increased the melting point of ice

When pressure is increased the melting point of ice 

(1) increases 

(2) does not change 

(3) decreases 

(4) depends on the impurities in the ice 


Answer: (3) In this case, if we increase the pressure on the ice the ice-water system wants to try to lower it again. It can do that by making itself fit into a smaller volume. But since water fills a smaller volume when it’s liquid, rather than solid, it will go to a lower melting point — allowing more solid to become liquid and hence when we increase pressure, the melting point of ice decreases because of the inverse relationship between the pressure and melting point of ice.

When pressure is increased the melting point of ice   (1) increases   (2) does not change   (3) decreases   (4) depends on the impurities in the ice


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