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Q.

A glass vessel contains air at 60oC. To what temperature must it be heated to expel one third of the air, the pressure remaining constant. (Neglect the expansion of the vessel)

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a

327oC

b

226.5oC

c

127oC

d

427oC

answer is B.

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Detailed Solution

PVmT = constant ;
Tm = constant; T1m1 = T2m2                  if m3 is expelled then m-m3that is 2m3 is remained
(333)(m1)=T22m13
T2 = 499.5 K t2 = 226.5oC

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