 # What Temperature Is Air Most Dense?

## How do you calculate air temperature?

NASA supplies a formula that calculates the expected stratospheric temperature (T in degrees C) given the global average temperature of -57 degrees C at 25 km altitude.

The formula is T = -131 + (0.003 * altitude in meters)..

## What is the weight of air in a room 20 by 30 by 10?

So you need to know the density of air. As is turns out, the approximate density of air at sea level (and at 20 C) is 1.2 kilograms per cubic meter. m = 600 kilograms. So, the air in your room weighs approximately (depending on how wet it is, what temperature, etc) 600 kg.

## What is the density of air at 20 degrees Celsius?

At 20 °C and 101.325 kPa, dry air has a density of 1.2041 kg/m³.

## What is less dense air?

HydrogenHydrogen has a mass of 2 grams/ 22.4 liters of Volume. The average mass of the air is approximate 28.8 grams / 22.4 liters of Volume. Hydrogen has only about 7% of the mass of atmospheric air. making it much less dense than air.

## Is air more dense than water?

Air that is near sea level has a density that averages 1.275 kg/m^3. … Therefore, at sea level, air is 784 times less dense than water. Expressed in another way, a volume of air at sea level has 0.1275% of the density of the same volume of water. Dirt is about 2.5 times the density of water.

## How can you increase the density of air?

Air density is the mass per unit volume. It can be calculated using a formula that relates pressure and temperature, two key variables affecting air density. As air flow (pressure) increases, density goes up. You can pack more air into a given space if you push it in with a turbo, supercharger, or ram-air system.

## Which air is more dense?

air has mass and density, and. cold air is denser than warm air.

## Is air thicker at night?

At night, after the sun goes down, the atmosphere cools and the temperature drops. … The atmosphere is the most dense near the surface because of gravity. As one goes higher, the air gets thinner and thinner.

## What is density of air at NTP?

1.204 kg/m3NTP – Normal Temperature and Pressure – is defined as air at 20oC (293.15 K, 68oF) and 1 atm (101.325 kN/m2, 101.325 kPa, 14.7 psia, 0 psig, 29.92 in Hg, 407 in H2O, 760 torr). Density 1.204 kg/m3 (0.075 pounds per cubic foot)

## What is the density of air at different temperatures?

TemperatureDensity[°C][kg/m3][lbm/ft3]101.2460.0778151.2250.0765201.2040.075218 more rows

## How dense can air get?

0.00128Densities of Common Elements and CompoundsSubstanceDensity grams per mLAir0.00128Carbon Dioxide0.001977Water1.002 more rows

## Why moist air is less dense?

With all factors equal, moist air is less dense than dry air because water has a lower molecular weight than nitrogen and oxygen. Since lower air density offers less resistance to the flight of a baseball, the ball will travel farther when humidity is higher —advantage hitter.

## Which air is lighter hot or cold?

Hot air is lighter than cold air. The reason fr this is when air gets heated up it expands and becomes less dense than the air surrounding it also the distance between the molecules increases. So the less dense air floats in the much denser air just like ice floats on water as ice is less dense than water.

## Does dense air rise?

Hot air rises because when you heat air (or any other gas for that matter), it expands. When the air expands, it becomes less dense than the air around it. The less dense hot air then floats in the more dense cold air much like wood floats on water because wood is less dense than water.

## Why cold air is heavy?

The absorbed energy makes the molecules in air move and expand, therefore decreasing the airs density. The opposite is true for cold air. It is more dense because the molecules are closer together and they are closer together because the bonds are absorbing less energy and therefore do not move as much.

## Does air density increase with temperature?

Density and pressure/temperature As pressure increases, with temperature constant, density increases. Conversely when temperature increases, with pressure constant, density decreases. Air density will decrease by about 1% for a decrease of 10 hPa in pressure or 3 °C increase in temperature.

## How do you find the density of air with temperature?

You can show that this matches theory by re-arranging the ideal gas law: PV = mRT for pressure P, volume V, mass of the gas m, gas constant R (0.167226 J/kg K) and temperature T to get ρ = P/RT in which ρ is density in units of m/V mass/volume (kg/m3).