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Mass of 3.76 litre of oxygen at 2 standa...

Mass of 3.76 litre of oxygen at 2 standard atmosphere pressure and `20^@C` is 10 g. find the value of R.

Text Solution

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Given p=2 standard atmosphere
`=2 times 76 times 13.6 times 981 dyn.cm^-2`
`V=3.76 times 10^3 cm^3, T=273+20 =293 K and n=10/32`
mol,(where 32 is the molecular weight of oxygen)
`therefore pV=nRT`
or, `R=(pV)/(nT)=(2times76times13.6times981times3.76times10^3times32)/(10times293)`
`=8.33 times10^7erg.mol^-1.K^-1`
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