- a process where one or more substances (elements) rearrange themselves to form a new substance....
TRANSCRIPT
- a process where one or more substances (elements) rearrange themselves to form a new substance.
http://dictionary.reference.com/browse/chemical%20reaction
http://www.sac.edu/students/support_services/ats/students/mgironS16/HM00368_%5B1%5D.gif
What part of atoms are affected?
In a chemical reaction the electrons are affected by forming and breaking chemical bonds.
http://en.wikipedia.org/wiki/Chemical_reaction
What is happening during a chemical Rx?
1. Reactants react to form products.
reactants - the materials that are their before the reaction
products - the substances that are formed from the reaction
2. Substances that are formed from the reaction
http://wildeboer-fitch.wikispaces.com/Chemical+Reaction+Primer
Bubbling Increase or decrease in temperature Light Change in Color Energy Produced Gas Formed Formation of Precipitate (precipitate - a liquid added to a liquid, forming a solid which is the
precipitate)http://wiki.answers.com/Q/What_are_the_5_signs_of_a_chemical_reaction http://images.google.com/imgres?imgurl=http://students.ed.uiuc.edu/ljgriffi/project/grifunit3/1REPLACE.GIF&imgrefurl=http://students.ed.uiuc.edu/ljgriffi/project/grifunit3/
griffchemicalreactions.htm&usg=__3hHoM5XfiXPEqQ9kJMC8UktYZoc=&h=288&w=364&sz=17&hl=en&start=16&um=1&tbnid=AgaL_6Rr0U793M:&tbnh=96&tbnw=121&prev=/images%3Fq%3Dchemical%2Bdecomposition%2Breaction%26gbv%3D2%26um%3D1%26hl%3Den
The Law of Conservation of Mass – “The principle that in any closed system subjected to no external forces, the mass is constant irrespective of its changes in form; the principle that matter cannot be created or destroyed.”
In other words matter can be rearranged but not destroyed or created.
http://en.wikipedia.org/wiki/Conservation_of_mass
http://dictionary.reference.com/browse/conservation%20of%20mass
Chemical reactions are changes that result in one or more new substances.
These changes always have a change in energy.
This means that when a chemical reaction occurs energy is either given off or taken in.
Energy reactions can be described as endothermic and exothermic reactions.
http://www.fordhamprep.com/gcurran/sho/sho/lessons/lesson16.htm
Exothermic - a chemical reaction that releases heat
Releases energy in the form of heat, light and electricity
EX- Rusting Iron
http://jchemed.chem.wisc.edu/JCESOFT/CCA/CCA3/STILLS/GLYCER/GLYCER/64JPG48/7.JPG
http://dictionary.reference.com/browse/exothermic http://en.wikipedia.org/wiki/Exothermic_reaction http://antoine.frostburg.edu/chem/senese/101/thermo/faq/exothermic-endothermic-examples.shtml
Endothermic – a chemical reaction that absorbs heat
Gains energy in the form of heat Need heat to be performed EX - Cooking an egg
Endothermic reaction of
barium hydroxide
and ammonium salt.
http://genchem.chem.wisc.edu/demonstrations/Movies/endosm.gif http://dictionary.reference.com/browse/endothermic http://en.wikipedia.org/wiki/Endothermic
Potential Energy – energy that is stored and can be transformed into other forms of energy such as heat, light, electricity and sound.
http://projectsol.aps.com/images/common/digestion2.gif
http://en.wikipedia.org/wiki/Potential_energy
http://dictionary.reference.com/browse/potential%20energy
Energy that is needed to initiate the reaction
http://www.bio-medicine.org/biology-definition/Activation_energy/
http://media-2.web.britannica.com/eb-media/28/4728-004-3ED6A907.gif
Synthesis Decomposition Combustion Single Replacement Double Replacement
When two or more substances combine to form a more intricate compound. The opposite of Decomposition Basic formula - A +B AB
Example - Hydrogen Gas + Oxygen Gas = Water
Formula - http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm
http://en.wikipedia.org/wiki/Chemical_synthesis
The process of burning – the production of heat and light
It is an exothermic reaction
Example - CH4 + 2O2 + 7.52N2 → CO2 + 2H2O + 7.52N2 + heat
http://library.thinkquest.org/2923/react.html
http://content.answers.com/main/content/wp/en-commons/thumb/f/f0/200px-Et_baal.jpg
http://en.wikipedia.org/wiki/Combustion
http://dictionary.reference.com/browse/combustion
The flames are caused from the fuel that is going through combustion (burning).
A single, uncombined element replaces another element in a compound
Basic Formula - A+BC AC+B Example – When Zinc combines with Hydrochloric Acid, the Hydrogen is replaced by Zinc. Formula -
http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm
http://wiki.answers.com/Q/What_is_a_single_replacement_reaction
http://wiki.answers.com/Q/What_is_a_single_replacement_reaction
Visual Single Replacement
A compound that is broken up into two different products. (two at the least)
The opposite of Synthesis Basic Formula - AB A + B Example - Water broken down into hydrogen gas and oxygen gas
Formula –
http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm
http://library.thinkquest.org/2923/react.html
Two compounds swap places in order to form two new compounds
Basic Formula – AB + CD AD + CB Example – When Silver Nitrate combines with Sodium
Chloride, Silver Chloride and Sodium Nitrate are formed because the Silver and Sodium swap places.
Formula –
http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm
Visual Double Replacement
Chemical Reaction Definition –
http://dictionary.reference.com/browse/chemical%20reaction
Chemical Reaction Basics –
http://en.wikipedia.org/wiki/Chemical_reaction
http://wildeboer-fitch.wikispaces.com/Chemical+Reaction+Primer
Signs of a Chemical Reaction –
http://wiki.answers.com/Q/What_are_the_5_signs_of_a_chemical_reaction
The Law of Conservation of Mass –
http://en.wikipedia.org/wiki/Conservation_of_mass
http://dictionary.reference.com/browse/conservation%20of%20mass
Chemical Potential Energy –
http://en.wikipedia.org/wiki/Potential_energy
Endo and Exothermic Reactions – http://dictionary.reference.com/browse/endothermic http://en.wikipedia.org/wiki/Endothermic http://dictionary.reference.com/browse/exothermic http://en.wikipedia.org/wiki/Exothermic_reaction http://antoine.frostburg.edu/chem/senese/101/thermo/faq/exothermic-endothermic-examples.shtml
Activation Energy –
http://www.bio-medicine.org/biology-definition/Activation_energy/
Synthesis Reaction –
http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm
Combustion Reaction –
http://library.thinkquest.org/2923/react.html
http://content.answers.com/main/content/wp/en-commons/thumb/f/f0/200px-Et_baal.jpg
http://en.wikipedia.org/wiki/Combustion
Single Replacement Reaction –
http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm
http://wiki.answers.com/Q/What_is_a_single_replacement_reaction
Decomposition Reaction-
http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm
Double Replacement Reaction –
http://www.usoe.k12.ut.us/curr/science/sciber00/8th/matter/sciber/chemtype.htm