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ENTROPHY IS DIRECTLY PROPORTIONAL TO TEMPERATURE.THEN WHY IS FORMULA (DELTA)S=Q/T WHERE S IS ENTROPHY AND T IS THE TEMPERATURE VALID.

ENTROPHY IS DIRECTLY PROPORTIONAL TO TEMPERATURE.THEN WHY IS FORMULA (DELTA)S=Q/T WHERE S IS ENTROPHY AND T IS THE TEMPERATURE VALID.

Grade:12

2 Answers

Ranjita yadav
35 Points
10 years ago

Hey..Its right that when a system absorbs heat , the molecules start moving faster because kinetic energy increases but for the same amount of energy absorbed at low temperature , the disorder is more than at higher temperature.This shows that entropy is inversely proportional to temperature.

Devesh Lall
35 Points
10 years ago

SOLUTION

Since entrophy is defined as the degree of disorderness in the universe & it is true that it is dir. prportional to temp.

but mathematically, disorder of the system is measured by the energy absorbed by the system to attend that disorder.

(delta)s=+ve if heat is absorbed and (delta)s =-ve if heat is evolved.If heat is absorbed at low temp., it becomes more 

disordered (i.e- entrophy increases) than when the same amt. of heat is added at higher temp.

so, the req. formula is:-  (delta)S =Q/T

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