Question

A sealed flask with a capacity of $2\, dm ^3$ contains $11 \, g$ of propane gas The flask is so weak that it will burst if the pressure becomes $2\, MPa$ The minimum temperature at which the flask will burst is ______${ }^{\circ} C$ [Nearest integer]

(Given: $R =8.3 \,J \,K ^{-1} mol ^{-1}$ Atomic masses of $C$ and $H$ are $12\, u$ and $1 \,u$ respectively) (Assume that propane behaves as an ideal gas)

Answer 1

The correct answer is 1655
Moles of C3​H8​=4411​=0.25 moles
PV=nRT
⇒2×106×2×10−3=0.25×8.3×T
⇒T=1927.710K=1654.56∘C