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Q.

Argon is an inert gas used in light bulbs to retard the vaporization of the filament. A certain light-bulb containing argon at 1.25 atm and 18oC is heated to 85oC at constant volume. Calculate its final pressure.

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a

1.53 atm

b

1.25 atm

c

1.35 atm

d

2 atm

answer is A.

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Detailed Solution

Given, P1=1.25atm , T1= 18oc = 291K

           P2= ? , T2 = 85oc = 358K

P1T1=P2T2 1.25291=P2358 ∴P2 =1.53atm

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