+244 when 100 g of liquid water initally at a temperature of 33 c freezes, the entropy of the water:
A.decreases
B.does not change
C.could either increase or decrease it depends on other factors
D. increases
+244 A refirgerator pulls heat from the inside compartment at the rate of of 10kJ. It dumps 14 KJ into the air in the kitchen each cycle. What is the coefficient of the performance?
A. 0.40
B.0.71
C.2.5
D.1.4
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Damien: Most of your questions appear to be about thermodynamics. Only Alan is competent enough to be able to answer Physics questions. Also, it would be helpful if you gave us some formulas from your Textbook, about the relationships of various states and substances to each other, such as heat, temperature.....etc.
+33661 "when 100 g of liquid water initally at a temperature of 33 c freezes, the entropy of the water:
A.decreases
B.does not change
C.could either increase or decrease it depends on other factors
D. increases"
In order for the water to reduce in temperature it must lose heat to it's surroundings. The entropy of the water will decrease and that of the surroundings will increase.
The heat lost by the water = the heat gained by its surroundings, but, since the surroundings must be at a lower temperature to start with, the entropy of the surroundings will increase by more than the entropy of the water decreases (entropy = heat gained or lost divided by temperature).
