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What is the composition of the liquid?
The composition of liquid air is: 80 % nitrogen, 19 % oxygen 0,9 % argon, 0,1 % minor gases.
What is the difference between a liquid and its chemical composition?
A liquid is a compound or a mixture; the chemical composition is representative for this liquid.
What happens when liquids are exposed to air?
It evaporates :)
Why do liquids smell?
Liquids can smell due to the presence of volatile molecules that are released into the air and are detected by our sense of smell. These molecules can come from the liquid itself or from substances dissolved in the liquid. The smell of a liquid can give us information about its composition and quality.
Why does liquid nitrogen exposed to air is a physical change?
When liquid nitrogen is exposed to air, it rapidly evaporates and turns into nitrogen gas. This process is a physical change because only the physical state of the substance is changed from liquid to gas, without altering its chemical composition.
How does air temperature change with atmospheric composition?
The composition of air depends upon altitude.
Is cooling a mixture of air and kerosene vapor so that liquid kerosene condenses out a physical change?
Yes, cooling a mixture of air and kerosene vapor to condense liquid kerosene is a physical change. This process involves a change in the state of the kerosene from vapor to liquid without altering its chemical composition. The air remains unchanged as well, reinforcing that this transformation is a physical rather than a chemical change.
How does the composition of air change at the top of amountain?
The composition is the same, the air is just less dense.
What is the word for when air is cooled into liquid?
Air to liquid = condensation
Is liquefaction of air physical change?
Yes, liquefaction of air is a physical change because it does not involve any change in the chemical composition of the air molecules. It is a reversible process where the air transitions between gas and liquid states due to changes in temperature and pressure.
What is the composition of gases found in inhaled air?
gas composition in air is the sum of the gas individual element and that of the air i.e oxygen and nitrogen
Why is dry air used to figure out the percent of each part of the atmosphere?
The amount of water vapor that air can hold varies according to temperature. If you started with saturated air at 30 °C and cooled it down to 10 °C, water would condense out of it - changing the composition. The other gaseous components would not condense out until you reached cryogenic temperatures (ever heard of liquid nitrogen?). The composition of dry air is thus fairly constant but humid air varies widely according to temperature and degree of saturation, so it doesn't make a very good standard for describing the composition of air.
