Gases questions | form five Chemistry

Briefly explain why beyond certain temperatures gases cannot be liquefied.

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UNSOLVED

One mole of diethyl ether occupies 1.5 litres at 227^oC. Calculate the pressure if the Van der Waals constants for diethyl ether are : a=17.38 atm.litre²mol^-1 and b=0.134 litre mol^-1.

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UNSOLVED

Define the following terms with reference to gases:

1. Critical temperature
2. Critical volume
3. Critical pressure

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UNSOLVED

From the ideal gas equation , derive the relationship between density of a gas in grams per dm³, the gas pressure in atmosphere , the temperature (T) in kelvin, the relative molecular mass of a gas (Mr) and the gas constant , R.

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UNSOLVED

A certain gas is composed of 21% by volume of oxygen, 1% of argon and 78% of nitrogen. Find the density in gdm^-3 at 20^oC and 98.65kNm^-2 pressure.

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UNSOLVED