An iron tank contains helium at a pressure of 2.5 atm at 250C .The tank can withstand a maximum pressure of 10 atm the building in which tank has been placed catches fire. Predict whether, the tank will blow up first or melt (m.p of Fe=15350 C.)


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P1 = 2.5 atm 

P2 = ? 

T1= 25o C =298 K 

T2 = 15350 C =1808 K 

According to Gay Laussac law, 

P1/ T1 = P2 / T2 

P2 = 2.5 x 1080/ 298 =15.16 atm. 

Since pressure of gas in the tank is much more than 10 atm at the m.p. of Fe.Thus tank will blow up before reaching m.p.