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Q.

A large open flask contains air at 27oC. In order to expel half the mass of air from the flask, the flask should be heated to 

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a

127oC

b

327oC

c

227oC

d

183oC

answer is B.

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Detailed Solution

PV=mMRTmT=const

m1T1=m2T2m×300=m2T2

T2=600K

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A large open flask contains air at 27oC. In order to expel half the mass of air from the flask, the flask should be heated to