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Title: Why Glow-in-the-Dark Objects, Well... Glow in the Dark
Description: Notes about the process and chemicals involved when you snap a glow stick and why it illuminates color. Also notes about generally all glow-in-the -dark items. Directed towards first or second year level chemistry.
Description: Notes about the process and chemicals involved when you snap a glow stick and why it illuminates color. Also notes about generally all glow-in-the -dark items. Directed towards first or second year level chemistry.
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Hannah Sheets
Per
...
colors
to be exposed
➔ Range of diff
...
types of dyes
➔ Molecules of dye are always present in solution
➔ Diphenyl oxalate + hydrogen peroxide slowly used up by reaction until 1 runs out and
reaction ceases
➔ ^ At this point glow stick stops glowing
➔ Glow sticks should not be cut open
➔ Reaction of 2 solutions can produce small amounts of phenol as a byproduct
➔ Skin contact can result in irritation or dermatitis (red, swollen, sore, blistering skin)
➔ Reactions influenced by temperature Warm temp
...
= decreased rate of reaction
➔ ^ That’s why putting glow sticks in freezer can make them last longer
( ttp://www
...
com/2014/10/14/glowsticks/
h
)
lowintheDark Objects:
G
➔ Most glow in the dark objects need to be charged
➔ All glow in the dark products contain phosphors
➔ Phosphor = substance that radiates visible light after being energized
➔ Phosphors are in TV screens, computer monitors, & fluorescent lights
➔ TV screen = electron beam strikes phosphor to energize it
➔ Contains thousands of tiny phosphor picture elements that emit 3 diff
...
like expensive watches persay
➔ ^ In product, phosphor is mixed w/ radioactive element & the radioactive emissions
energize phosphor continuously
➔ Radioactive element radium has halflife of 1600 yrs
...
(most common in
watches)
➔ Radioactive element promethium (manmade) has halflife of abt
...
( ttp://science
...
com/innovation/sciencequestions/question388
...
Brief explanation of topic
...
The succession of glow sticks creating a glow or light comes down to both
their structures, as well as their chemical solutions
...
There is two cylinders, one
on the outside (plastic) containing the chemical diphenyl oxalate plus the desired dye color, and
another glass cylinder (to easily break) inside of the outer one which contains the chemical
hydrogen peroxide
...
The hydrogen peroxide then
oxidises the diphenyl oxalate and creates the unstable compound of 1,2 dioxetanedione
...
The electrons then absorb the energy and are in an “excited” state
...
This
process is called chemiluminescence
...
So instead of
snapping cylinders to emit a glow you need to charge the glowinthedark object
...
Some types of
energy to energize phosphors are: electron beams Found in televisions, or ultraviolet light
found in fluorescent lights
...
Diagram:
https://researchthetopic
...
com/How+does+glow+in+the+dark+paint+work%3F++R
3
...
In the
Flame Lab when heat was applied the electrons they were able to move from their ground state
to higher energy levels
...
This energy corresponded to specific wavelengths which produced
particular colors of light
...
Instead of a heat reaction, in glow sticks and glowinthedark objects
it is a certain chemical reaction that causes the electrons to jump to higher energy levels
...
Title: Why Glow-in-the-Dark Objects, Well... Glow in the Dark
Description: Notes about the process and chemicals involved when you snap a glow stick and why it illuminates color. Also notes about generally all glow-in-the -dark items. Directed towards first or second year level chemistry.
Description: Notes about the process and chemicals involved when you snap a glow stick and why it illuminates color. Also notes about generally all glow-in-the -dark items. Directed towards first or second year level chemistry.