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Standard XII

Chemistry

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The pressure ...

Question

The pressure out side a jet plane flying at high attitude falls considerably below atmospheric pressure at sea level. The air inside the cabin must therefore be pressurized to protect the passengers. What is the pressure $(i n a t m o s p h e r e)$ in the cabin if the barometer reading is 688mm of Hg?

0.905 atm

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6.88 atm

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9.05 atm

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data, insufficient

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Solution

The correct option is A 0.905 atm
$1 a t m = 760 m m H g$

$x a t m = 688 m m H g$

$x = \frac{688}{760}$

$x = 0.9052 a t m$

Option A is correct

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Similar questions

Q. At sea level, the atmospheric pressure is

76 c m

of Hg. If air pressure falls by

10 m m

of Hg per

120 m

of ascent, what is the height of a hill where the barometer reads

70 c m H g

Q. A jet plane having a cabin of length

l - 50 m

flies along the horizontal with an acceleration

a = 1 m / s^{2}

The air density in the cabin is

ρ = 1.2 \times 10^{- 3} g / c m^{3}

What is the difference between the atmospheric pressure and the air pressure exerted on the ears of the passengers sitting in the front, middle, and rear parts of the cabin?

At sea level , the atmospheric pressure is 76 cm of Hg . If air pressure falls by 10mm of Hg per 120m of ascent, what is the hight of a hill where the barometer reads 70 cm of Hg . State the assumption made by you.

Assumption: atmospheric pressure falls linearly with ascent.

Why do aircrafts flying at high altitude must have pressurize cabins

Q. Jet aircrafts fly at altitudes above

30, 000

ft where the air is very cold at

- 40^{\circ} C

and the pressure is

0.28 a t m

. The cabin is maintained at

1 a t m

pressure by means of a compressor which exchanges air from outside adiabatically. In order to have a comfortable cabin temperature of

25^{\circ} C

, we will required in addition.

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The pressure out side a jet plane flying at high attitude falls considerably below atmospheric pressure at sea level. The air inside the cabin must therefore be pressurized to protect the passengers. What is the pressure (in atmosphere) in the cabin if the barometer reading is 688mm of Hg?

The correct option is A 0.905 atm1atm=760mmHgxatm=688mmHgx=688760x=0.9052atmOption A is correct

The correct option is A 0.905 atm
$1 a t m = 760 m m H g$

$x a t m = 688 m m H g$

$x = \frac{688}{760}$

$x = 0.9052 a t m$

Option A is correct