what is the pressure of air at room temperature...?

Question

at around 500 m above sea level

Answer 1

In what is called "standard atmosphere", the air pressure at sea level is 1013.25 mBars and temperature 20 C.
It goes down as you go up, and you can calculate it this way:
P = colog10(5 - (h/15500))
where colog10 = co-logarythm base 10
h the height in meters,
P the pressure at given height in Pascal.
At 500m, this will give you more or less 928mBars. (0.17mB per meter)
As approximation, I use 0.20 mB per meter, that's good enough.
Now, remember that the pressure at sea level is NOT always 1013.25mB... To calculate the exact pressure, you better make a call to your closest Air Traffic Control, and ask the local pressure at sea level (as "QNH"), then make your calculations...

Answer 2

Sea level pressure is 14.7 psi or 29.92" Hg or 101.3 mB on a standard day (15C 59F). Since room temp is higher you might expect the pressure to be higher but in the real world it depends on several factors.

On the aircraft I fly there is a manifold pressure gauge that tells me the pressure of the air going into the engine. When the plane is shut down in the hangar it is usually reading somewhere about 30"Hg (15psi) depending on whether there is a high or low pressure weather system moving through.

Answer 3

As sea level, a glass tube filled with mercury and placed in a saucer of mercury will rise to 29 inches.

Answer 4

I suggest you to be clear in framing your question.The air pressure at room temperature if you take the universe as the system is 1.0103 Bar ( Kg / cm²). For all practical purposes it is taken as 1Bar.

Answer 5

At sea level: 15lbs per sq inch

Answer 6

14.7 pounds per square inch. But it would be different depending on the altitude of the room.

Answer 7

It should be atmospheric pressure so it should be slightly above 14.7 psia

Answer 8

depends on the altitute of the room!!!

Answer 9

if room is unpressurized, then same atmospheric as 14.7psi