Thermodynamics Question 258

Question: The pressure inside a tyre is 4 times that of atmosphere. If the tyre bursts suddenly at temperature 300 K, what will be the new temperature?

Options:

A) 300(4)772

B) 300(4)2/7

C) 300(2)772

D) 300(4)2/7

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Answer:

Correct Answer: D

Solution:

[d] Under adiabatic change T1T2(P1P2)1γγorT2=T1(P1/P2)1γγ

T2=300(4/1)1(7/5)(7/5);

γ=1.4=7/5 for air

or T2=300(4)2/7



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