Difference between revisions of "Collision Theory"
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: [[Collision Theory]] is based on the [[Kinetic Theory]] which [[explain]]s the motion of [[particle]]s in [[matter]]. | : [[Collision Theory]] is based on the [[Kinetic Theory]] which [[explain]]s the motion of [[particle]]s in [[matter]]. | ||
: In [[Collision Theory]] [[particle]]s are said to [[collide]] with one another and that if two [[reactant]]s in a [[Chemical Reaction|reaction]] [[collide]] with enough [[energy]] this will cause them to [[Chemical Reaction|react]]. | : In [[Collision Theory]] [[particle]]s are said to [[collide]] with one another and that if two [[reactant]]s in a [[Chemical Reaction|reaction]] [[collide]] with enough [[energy]] this will cause them to [[Chemical Reaction|react]]. | ||
| + | : [[Collision Theory]] indicates that the [[particle]]s of [[reactant]] must [[collide]] for the [[Chemical Reaction|reaction]] to occur. | ||
===Temperature and Collision Theory=== | ===Temperature and Collision Theory=== | ||
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===Pressure and Collision Theory=== | ===Pressure and Collision Theory=== | ||
| − | The [[Particle Model]] | + | The [[Particle Model]] [[explain]]s how increasing the [[pressure]] on a [[gas]], and compressing it, causes the [[particle]]s in that [[gas]] to [[collide]] more frequently (more often). This means at higher [[pressure]]s the [[particle]]s of [[reactant]]s will [[collide]] with each other more frequently, increasing the chances of them [[Chemical Reaction|reacting]] and increasing the [[Rate of Reaction|rate of reaction]]. |
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| + | ===Concentration and Collision Theory=== | ||
| + | The [[Particle Model]] [[explain]]s how a higher [[concentration]] of [[gas]], [[liquid]] or [[solute]] causes [[particle]]s to [[collide]] more frequently (more often). This means at higher [[concentration]] the [[particle]]s of [[reactant]]s will [[collide]] with each other more frequently, increasing the chances of them [[Chemical Reaction|reacting]] and increasing the [[Rate of Reaction|rate of reaction]]. | ||
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| + | ===Surface Area and Collision Theory=== | ||
| + | The [[Particle Model]] [[explain]]s how [[particle]]s in a [[solid]] [[vibrate]] around fixed positions. This means most of those [[particle]]s cannot [[collide]] with other [[reactant]]s. It is only the [[particle]]s on the surface of the [[solid]] that can have other [[reactant]]s [[collide]] with them. Therefore the larger the [[Surface Area|surface area]] the more frequently [[reactant]] [[particle]]s in a [[gas]] or [[liquid]] will [[collide]] with the [[reactant]] [[particle]]s in the [[solid]], increasing the [[Rate of Reaction|rate of reaction]]. | ||
Revision as of 13:50, 16 January 2019
Contents
Key Stage 4
Meaning
Collision Theory is a scientific theory which explains that reactions take place via the collision of particles of reactants.
About Collision Theory
- Collision Theory is based on the Kinetic Theory which explains the motion of particles in matter.
- In Collision Theory particles are said to collide with one another and that if two reactants in a reaction collide with enough energy this will cause them to react.
- Collision Theory indicates that the particles of reactant must collide for the reaction to occur.
Temperature and Collision Theory
Kinetic Theory explains how increasing the temperature of a substance causes the particles to gain more kinetic energy so they travel faster. When particles travel faster (due to higher temperatures) they collide with more energy and they collide more frequently (more often). This means at higher temperatures particles of the reactants are more likely to collide with each other and they are more likely to have enough energy to react when they do. This increases the rate of reaction.
Pressure and Collision Theory
The Particle Model explains how increasing the pressure on a gas, and compressing it, causes the particles in that gas to collide more frequently (more often). This means at higher pressures the particles of reactants will collide with each other more frequently, increasing the chances of them reacting and increasing the rate of reaction.
Concentration and Collision Theory
The Particle Model explains how a higher concentration of gas, liquid or solute causes particles to collide more frequently (more often). This means at higher concentration the particles of reactants will collide with each other more frequently, increasing the chances of them reacting and increasing the rate of reaction.
Surface Area and Collision Theory
The Particle Model explains how particles in a solid vibrate around fixed positions. This means most of those particles cannot collide with other reactants. It is only the particles on the surface of the solid that can have other reactants collide with them. Therefore the larger the surface area the more frequently reactant particles in a gas or liquid will collide with the reactant particles in the solid, increasing the rate of reaction.