Chemistry
Give reasons for the following :
Gases unlike solids and liquids exert pressure in all directions.
Gas Laws
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Answer
The force of attraction between the molecules is negligible in case of gases. The molecules of a gas move in straight lines, undergo random collision with other molecules and occupy the complete space available unlike solids and liquids. The impact of gas molecules with high velocity causes pressure to be exerted in all directions.
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Related Questions
At a given temperature the pressure of a gas reduces to 75% of it's initial value and the volume increases by 40% of it's initial value. Find this temperature if the initial temperature was -10°C.
Name or state the following :
- The law which states that pressure remaining constant the volume of a given mass of dry gas is directly proportional to it's absolute [Kelvin] temperature.
- The law which studies the relationship between pressure of a gas and the volume occupied by it at constant temperature.
- An equation used in chemical calculations which gives a simultaneous effect of changes of temperature and pressure on the volume of a given mass of dry gas.
- The standard pressure of a gas in cm. of mercury corresponding to one atmospheric pressure.
- The absolute temperature value corresponding to 35°C.
Give reasons for the following :
Gases have lower densities compared to solids or liquids.
Give reasons for the following :
Temperature remaining constant the product of the volume & the pressure, of a given mass of dry gas is a constant.