Photochemical Smog (Animation)
#PhotochemicalSmog #AnimatedChemistry #KineticSchool
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Formation of Photochemical smog:
"Smog" is a mixture of fog and smog which occurs in some busy industrial cities.
Smoke + Fog = SMOG
Smog is of two types:
1. Classical Smog.
2. Photochemical Smog.
Classical Smog, is produced by the combustion or burning of fossil fuels like coal, petrol or gasoline etc., and caused by a mixture of smoke and SO2, present in air.
Classical smog also known as London Smog.
• It’s also reducing in nature.
• It occurs in cool, humid climate.
• Major Constituents are smoke, fog and sulfur dioxide.
• It can occur both during the day and at night.
In December 1952, London was trapped in a deadly cloud of fog and pollution for five days.
At the time, the city ran on cheap coal for everything from generating power to heating homes.
which was the result of classical smog.
Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the atmosphere.
• It is also referred to as "Summer Smog" or "Los Angeles Smog".
• It is an Oxidising Smog and visible as a Brown Haze.
• It only happens in the presence of sunlight.
• Major Constituents are Hydrocarbons, O3, PAN and NOx.
• It is most prominent during the morning and afternoon.
photochemical smog formation is influenced by the weather conditions, such as
• Warm Sunny Days.
• Gentle Winds.
• Lower Level Inversion, which is also known as Thermal Inversion.
• Combustion of hydrocarbon and Nitrogen Oxides.
Sources of Photochemical smog’s pollutants.
•Volcanic eruption
• Forest fire
• Automobiles
• industry
• power plant
Reaction of Photochemical smog:
•Nitrogen (N₂) and Oxygen (O₂) combine in the combustion process to form Nitric Oxide (NO).
N₂ + O₂ = 2NO
•This Nitric Oxide (NO) oxidized in the atmosphere to produce Nitrogen Dioxide (NO₂).
2NO + O₂ = 2NO₂
•Sunlight breaks down Nitrogen Dioxide (NO₂) into Nitric Oxide (NO) and an Oxygen radical (O).
NO₂ + h𝝊 = NO + O
•The Oxygen radical (O) combines with molecular Oxygen (O₂) to form Ozone (O₃).
O₂ + O = O
•Ozone (O₃) is the main component of photochemical smog.
•NO can remove O₃ by reacting with it to form NO₂ and O₂ .
NO + O₃ = NO₂ + O₂
Alternative Reactions:
NO and NO₂ can also react with the hydrocarbons instead of O₃ to form other volatile compounds known as PAN (peroxyacetyl nitrate).
NO₂ + O₂ + Hydrocarbons + light → PAN
a) Reactive hydrocarbon (those with C=C group) from auto exhaust interact with O₃ to from a hydrocarbon free radical RCH₂•.
b) RCH₂• rapidly reacts with O₂ to from another free radical RCH₂O₂•.
c) RCH₂O₂• reacts with NO to produce NO₂ & the free radical RCH₂O•
d) This new free radical next interacts with O₂ to yield a stable aldehyde (RCHO), and hydroperoxyl radical (HO₂•).
e) HO₂• then reactive with another molecule of NO to give NO₂ & HO•.
f) HO• is extremely reactive & rapidly reacts with a stable hydrocarbon RCH ₃ to yield H₂O & regenerate the hydrocarbon free radical RCH₂•, thereby completing cycle.
Peroxyacetyl nitrate is also known as peroxyacyl nitrate.
Photochemical smog was first identified in Los Angeles in 1944.
In 2017, Photochemical smog to envelop large parts of Beijing.
Otherwise, In November 2017, the air pollution spiked far beyond acceptable levels in Delhi.
Effects of Photochemical smog:
Photochemical smog's effects cause eye irritation, damage to the respiratory system and vegetation.
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Пікірлер: 68
Nice video...but background music should be less...
Never had watched a better illustration than this on youtube
thank you so much. I have an assignment regarding photochemical smog, this video was a great help cause I didn't know where to start.
@KINETICSCHOOL
2 жыл бұрын
I'm so glad!
very nice. very good animation also. thank you! fall forward
Thank you 😊 Love from India 🇮🇳.
This video was incredibly helpful. Thanks mate
👍🏻 great video
Bruh you nailed it
Please cover the most of topics of environmental science.. So nice vedio.. Having lots of information 👍👍👍
Remarkable
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Nicely explained ..
Very nice, loved it.. Thank you Made this boring chapter quite interesting through pictures...
Thank you sir 🙏🙏🙏. Nice vedio 👏👏👏.
Very very good vedio...
Informative
Absolutely fantastic
@KINETICSCHOOL
5 жыл бұрын
Thank you Sir. We value your feedback.
Really helpful and informative! However, there's much scope of improvement with the editing and graphics. Thank you for the efforts that went in making this! Love from India!❤️
@jigneshsabhadiya7358
3 жыл бұрын
www.engineeringchoice.com/smog-causes-effect-and-control-measures/
@Dwg256
2 жыл бұрын
16.11.2021.
@yashkirar4547
2 жыл бұрын
You are from riwa
Very very nice and easy to understand and appreciate your help sir
@KINETICSCHOOL
3 жыл бұрын
Thanks.
Nice video
Thank you so much it help me a lot in my assignment 👍👍👍👍👍👍thank you 👍
Very helpful and the rxns were ossum....
@KINETICSCHOOL
3 жыл бұрын
Thanks a ton
Very good
😎 Well done...it was awesome 👌 👏...
@KINETICSCHOOL
2 жыл бұрын
Thank you so much 😀
Keep it up
Much info i got from ur video
Background music is too loud so I can't hear the speaker, other than that nice video.
@KINETICSCHOOL
5 жыл бұрын
Thankyou for your feedback . We will try to improve in upcoming videos.
@jigneshsabhadiya7358
3 жыл бұрын
www.engineeringchoice.com/smog-causes-effect-and-control-measures/
Nice presentation 👍
@KINETICSCHOOL
2 жыл бұрын
Thanks a lot
Wow wat an explaination
@tarekatassi1243
5 жыл бұрын
truly
@kushagratiwari8842
3 жыл бұрын
what* explanation*
Nice video mam
Thanks it's really helpful
@k3nz1e73
Жыл бұрын
No worries
Amazing video
@KINETICSCHOOL
3 жыл бұрын
Thanks for the visit
Go by this video i complete understand the concept of this photochemical smog which made easy compare to boring teach by professors in college thank you very much
@KINETICSCHOOL
5 жыл бұрын
Such comments are truly inspiring. Thank you.
very nice explaination
@KINETICSCHOOL
2 жыл бұрын
Thanks and welcome
Reaction of Photochemical smog- 3:44
can you give sources for the underlying chemistry of photochemical smog... I need to research for an important project
Wacky animations and the google translator voice is hard to follow but nevertheless very good explained! Thanks for the video:)
Thanks ☺️😊
@KINETICSCHOOL
3 жыл бұрын
Welcome 😊
Is it a radicle or just atomic oxygen
❤❤
Thnkuuuu
Which app do you use for mKing this video
Very useful video, I am Global citizen of Earth, plant a tree to protect our home planet, wishing good time from INDIA..
Video is nice but background music is too loud
love from Pakistan
I Have Explained about How SMOG is Killing Me? In My Latest Video!!
Photochemical smog is loss Angel smog Not London smog London smog is known as classical smog
The video would be good without that annoying Music
Too long
Nice video