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Unformatted text preview: (19501959) P = 0.2
We know that, () Therefore, () Now, ( ( ( As per the problem ( (
)⁄ ⁄ ) ) ( ( )⁄ ) ) ( ( )⁄ grams per year )⁄ )........................................................(1)
⁄ ( ) Substituting the value in equation (1) we get,
() ( ⁄ ) (b) No
(c) () ( ⁄ ) ( ⁄ ) Now, Substituting the values we get,
() ( solving the equation for t we get (t) = 194.06 years ⁄ ) ( ⁄ ) 8. The production of CFC11 in a given year resulted in a significant ozone depletion.
By what fraction would this depletion be reduced if half the CFC11 produced in
that year were replaced by the equivalent mass production of HCFC22? Assume
steady state ozone depletion in both cases.
Solution #8: Reduction in ozone depletion if CFC11 was replaced by HCFC22 is given by:
Ozone Depletion Potential (ODP)
=
( Ozone Depletion Potential (ODP) of CFC11 = 1
Ozone Depletion Potential (ODP) of HCFC22 = 0.034
If half of CFC11 is replaced by HCFC22, OPD = (
Reduction in depletion = ( ) ⁄ ) ) ( )...
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 Spring '13
 TahirHusain

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