7.1 chemical reactions collision theory
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The document discusses factors that affect the rate of chemical reactions, including: 1) Collision theory - reactions only occur during collisions where particles have energy above the activation energy. 2) Higher temperatures lead to more particles with sufficient kinetic energy for reactions. 3) Increasing concentration means less space between particles, leading to more collisions and a faster reaction rate.
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ู
ูุฒู
ุฉ ุชุดุฑูุญ ุงูุฌูุงุฒ ุงูููููู (ูุธุฑู 3)
๐๐๐๐๐๐๐๐๐๐
ุชุชู
ูุฒ ูุฐูู ุงูู
ูุฒู
ุฉ ุจุนูุฏุฉ ู
ูู
ูุฒุงุช :
1- ู
ูุชุฑุฌู
ุฉ ุชุฑุฌู
ุฉ ุชููุงุณุจ ุฌู
ูุน ุงูู
ุณุชููุงุช
2- ุชุญุชูู ุนูู 78 ุฑุณู
ุชูุถูุญู ููู ููู
ุฉ ู
ูุฌูุฏุฉ ุจุงูู
ูุฒู
ุฉ (ููู ููู
ุฉ !!!!)
#ููู
_ู
ุงูู_ุฏุฑุฎ
3- ุฏูุฉ ุงููุชุงุจุฉ ูุงูุตูุฑ ุนุงููุฉ ุฌุฏุงู ุฌุฏุงู ุฌุฏุงู
4- ูููุงูู ุจุนุถ ุงูู
ุนููู
ุงุช ุชู
ุชูุถูุญูุง ุจุดูู ุชูุตููู ุฌุฏุงู (ุชูุนุชุจุฑ ูุฏู ุงูุทุงูุจ ุฃู ุงูุทุงูุจุฉ ุจุฅููุง ู
ุนููู
ุงุช ู
ูุจูู
ุฉ ูู
ุน ุฐูู ุชู
ุชูุถูุญ ูุฐูู ุงูู
ุนููู
ุงุช ุงูู
ูุจูู
ุฉ ุจุดูู ุชูุตููู ุฌุฏุงู
5- ุงูู
ูุฒู
ุฉ ุชุดุฑุญ ููุณูุง ุจ ููุณูุง ุจุณ ุชููู ุชุนุงู ุงูุฑุงูู
6- ุชุญุชูู ุงูู
ูุฒู
ุฉ ูู ุงูู ุณูุงูุฏ ุนูู ุฎุงุฑุทุฉ ุชุชุถู
ู ุฌู
ูุน ุชูุฑูุนุงุช ู
ุนููู
ุงุช ุงูุฌูุงุฒ ุงูููููู ุงูู
ุฐููุฑุฉ ูู ูุฐูู ุงูู
ูุฒู
ุฉ
ูุงุฎูุฑุงู ูุฐูู ุงูู
ูุฒู
ุฉ ุญูุงูู ุนูููู
ูุฅุชู
ูู ู
ููู
ุฅู ุชุฏุนููู ุจุงูุฎูุฑ ูุงูุตุญุฉ ูุงูุนุงููุฉ ููุท
ูู ุงูุชูููู ุฒู
ูุงุฆู ูุฒู
ููุงุชู ุ ุฒู
ูููู
ู
ุญู
ุฏ ุงูุฐูุจู ๐๐
๐ฅ๐ฅ๐ฅ๐ฅ๐ฅ๐ฅ๐ฅ๐ฅ๐ฅ
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7.1 chemical reactions collision theory
- 1. Sir. Muhammad Abdul Mageid CIE - IGCSE Chemistry Chapter 7 CHEMICAL REACTIONS
- 2. Contents 7.2 Interpreting Data 7.1 Rate (speed) of the Reaction 7.3 Photochemistry Friday, October 9, 2020 Sir. Muhammad Abdul Mageid
- 3. Friday, October 9, 2020 7.1 Rate (speed) of the Reaction Sir. Muhammad Abdul Mageid Collision Theory ๏ In order for a reaction to occur reactant particles must collide . ๏ Not all collisions between reactants succeed in making products. ๏ Only those collisions with sufficient energy to break the bonds in the reactants will lead to a reaction. ๏ A successful collisions is one where reactants react and products are formed ๏ The minimal amount of energy a collision needs to be successful is called The Activation Energy ๏ If the reactants collide and have an energy less than the activation energy, then no reaction occurs.
- 4. Friday, October 9, 2020 7.1 Rate (speed) of the Reaction Sir. Muhammad Abdul Mageid Collision Theory ๏ For substances to react , their particles: 1- must collide 2- must collide with enough energy to break existing bonds ๏ The higher the number of successful collisions per unit time , the higher the rate of reaction Rate of the reaction ๏ Is the concentration of reactant used up , or product made , in a given time ๏ Units of rate : ๐๐๐/๐ ๐ ๐ . ๐บโ๐
- 5. Friday, October 9, 2020 Temperature & Concentration Sir. Muhammad Abdul Mageid Diagram showing the increased kinetic energy that particles have at higher temperatures
- 6. Friday, October 9, 2020 Temperature & Concentration Sir. Muhammad Abdul Mageid Concentration โขIncreasing the concentration means there are more particles per cm3, so there is less space between the particles โขSince there are more particles then it follows that there are more collisions, hence the rate of reaction increases