It is required to reduce the volume of a gas by 20% by compressing it at a constant pressure. To do so, the gas has to be cooled. If the gas attains a final temperature of 157°C, find the initial temperature of a gas?
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Explanation:
initial condition
v1= x cc(suppose)
t1= ?
final conditions
v2= 80/100x = 4/5 x cc
t2= 157+ 273= 430 k
at constant temperatures= v1/t1 = v2/t2
t1= v1t2/v2
x*420/4/5x
430*5/4
t1= 537.5 k = 537.⅝ - 275= 264.5 c°
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