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Question

A bottle is closed by a cork which contains air at a temperature of 7C and pressure of 1 atm. The cork can withstand a pressure upto 1.3 atm. Then upto what maximum temperature can we heat the bottle so that the cork gets ejected? (Neglect thermal expansion of the bottle)

A
50C
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B
80C
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C
91C
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D
130C
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Solution

The correct option is C 91C
This is an isochoric process
P1T1=P2T2T280=1.3T2
T2=1.3×280=364 k
or 91 C

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