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An iron cylinder contains helium at a pressure of 250 Kpa at 300K. The cylinder can withstand a pressure of $1\times10^6 Pa$ . The room in which cylinder is placed catches fire. Predict whether the cylinder will blow up before it melts or not . melting point of cylinder = 1800K

$\begin{array}{1 1} (a)\;1100K\qquad(b)\;1200K\qquad(c)\;1300K\qquad(d)\;1400K \end{array}$
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1 Answer

Since volume of cylinder remains constant.
$\therefore \large\frac{P_1}{T_1} = \large\frac{P_2}{T_2}$
$=\large\frac{250\times10^3}{300} = \large\frac{1\times10^6}{T_2}$
$T_2 = 1200K$
Hence answer is (b)
answered Feb 11, 2014 by sharmaaparna1
 

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