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A horizontal capillary tube of uniform bore sealed at one end contains dry air trapped by a drop of mercury. The length of the air column is 142mm at #17^0C#.Determine the length of the air column at #25^0C#

Answer Text:
#(V1)/(T1) = (V2)/(T2)#
#142/290 = (V2)/298#
V2 = #(298 times 142)/290 #= 145.2mm