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One gram of activated carbon has a surfa...

One gram of activated carbon has a surface area of `1000m^2` considering complete coverage as well as monomolecular adsorption. How much ammonia at latm and 273K would be adsorbed on the surface of 44/7gr. carbon. If radius of a ammonia molecule is `10^(-8)cm` .........

Text Solution

Verified by Experts

The correct Answer is:
7
Total surface area of carbon `44/7 xx 10^(7) cm^(2) , r = 10^(-8) cm`
surface area of `NH_3 = pi r^2 = 22/7 xx 10^(-16) cm^2`
 No. of `NH_3` molecules adsorbed ` = ((44)/(7) xx 10^(7))/(22/7 xx 10^(-16)) = 2 xx 10^(23)`
vol. of `NH_3` adsorbed at STP `= (2 xx 10^(23))/(6 xx 10^(23)) xx 22.4 = 7.46 ` lit
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  • A slab of stone of area 3600 cm^(2) and thickness 10 cm is exposed on the lower surface to steam at 100^(@)C . A block of ice at 0^(@)C rests on upper surface of the slab. In one hour 4.8 kg of ice is melted. The thermal conductivity of the stone In js^(-1) m^(-1) k^(-1) is (latent heat of ice = 3.36 xx 10^(5) j//kg )

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