A sample of 60 cm3 of Ar(g) at 27°C was contained at a pressure of 155 kPa in a J shaped tube with mercury. Later the temperature was changed. When the mercury level was adjusted to give the same pressure of Argon the volume changed to 50 cm3 . What was the final temperature of Argon?   Why does the no. of moles dont change while its vol. change from 6cm^3 to 5 cm^3

Question

A sample of 60 cm3
of Ar(g) at 27°C was contained at a pressure of 155 kPa in a J shaped tube with
mercury. Later the temperature was changed. When the mercury level was adjusted to give the same
pressure of Argon the volume changed to 50 cm3
. What was the final temperature of Argon?

 

Why does the no. of moles dont change while its vol. change from 6cm^3 to 5 cm^3

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