Which of the following statements is/are correct? (a) all real gases are less compressible than ideal gas at high pressures? (6) hydrogen and helium are more co

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i cannot understand the relation between the z and compressibility.

z(is compressibility factor) is a correction factor which describes the deviation of a real gas from ideal gas behaviour.

how to know which gas is more compressible?

it depends on temperature and pressure. the compressibility factor for specific gases can be read from generalized compressibility charts that plot {\displaystyle Z} as a function of pressure at constant temperature.

got it??

i cannot understand the relation between z and compressibility

https://doubtnut.com/question-answer-chemistry/which-of-the-following-statement-is-are-correct--11034743 or check this video solution

please ask sourav after watching if you have any doubt😊

sir i cannot understand the relation between Z and compressibility

sourav do you know about compressibility factor??

yes sir it tells about the deviation from ideality.

yes it is the ratio of actual volume to ideal volume

and in ideal gas it is 1 because no attractive n repulsive forces in ideal gas

yes

so it changes for real gas due to change in attractive and repulsive forces

for real gas at high temperatures z is greater than 1...you know why??

due to increase in kinetic energy , random movement increase and volume increases.

yes thats the relation between all of these gases

where you have problem??

sir im having problem to know the relation between Z and compressibility. How do we know which gas is more compressible?

sourav for real gas two vanderwaal.consatnt comes a and b so according to value and relation which we discussed you can go for tha

if z>1 then you say real gas is more compressible than ideal gas

why so

z=pv/nRT z>1 means pv/nRT>1

so P> nRT/V

yes

so it is more compressible than ideal gas

more compressible means, it can be easily liquefied na?

no sourav

for liquefaction we take the value of a and b

for compressibility we take into consideration more intermolecular spaces

got sourav???

in option no 1, it is given high pressure so Z>1, so real gas should be more compressible na?

sourav just keep in mind two things for compressibility more intermolecular spaces and less intermolecular forces of attraction then more compressible

sir can you please explain option no 1..im still confused 😬

yes why not

sourav for real gas in pressure equation extra term a got added na... an^2/v2...means intermolecular forces of attraction gets more and i tell above if more intermolecular forces of attraction then less compressible

Ok i got it

but at high pressure some molecules gets comes closer...so attraction becomes more dear sourav....don't take it in more complicated way....then it creates more confusion

good😊👍

can you explain option 2?

Dear sourav He and H2 are exceptional gases.....

can we say that if z>1, the real gas is less compressible than ideal gas?