JEE Main 2022 · 25 Jul · Shift 2 · Chemistry Q82

← JEE Main 2022 · 25 Jul · Shift 2

ChemistryInteger+4 / -1Question 82 of 90

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 ______ °C. [Nearest integer]

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

Your answer

Answer and worked solution

Official answer: 1655

Moles $\frac{11}{44}=0.25$ . $T=\dfrac{PV}{nR}=\dfrac{2\times10^6\times2\times10^{-3}}{0.25\times8.3}\approx1928$ K $\approx1655$ °C.

Answer: 1655

Topics:Ideal gas equation

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JEE Main 2022 · 25 Jul · Shift 2, Chemistry question 82