C3b - Rate of Reaction 2

Chloe.Sharland
Mind Map by Chloe.Sharland, updated more than 1 year ago
Chloe.Sharland
Created by Chloe.Sharland almost 6 years ago
24
0

Description

GCSE CHEMISTRY (C3) Mind Map on C3b - Rate of Reaction 2, created by Chloe.Sharland on 06/09/2014.

Resource summary

C3b - Rate of Reaction 2
1 Collisions and Rate of Reaction
1.1 The particles in a chemical reaction must collide together for a reaction to take place. The more collisions there are, the faster the reaction. The idea of collisions is used to explain how different factors affect the rate of a reaction.
2 Temperature of the Reactants
2.1 Lower temperature - Lower rate. In a cold reaction mixture the particles move quite slowly because they have less kinetic energy. The particles will collide with each other less often and with less energy, so there will be less effective collisions per second
2.2 Higher temperature - higher rate. If the temperature is increased, the particles will move faster because they have more kinetic energy. They will collide with each other more often and with greater energy, so there will be more effective collisions per second.
3 Concentration of the Reactants
3.1 Lower concentration - lower rate. In a reaction where one or both reactants are in low concentrations, the particles are spread out. The particles will collide with each other less often, resulting in fewer effective collisions per second.
3.2 Higher concentration - higher rate. Where there are high concentrations of one or both reactants, the particles are crowded close together. The particles will collide with each other more often, resulting in more effective collisions per second.
4 Pressure of Gas
4.1 Low pressure- low rate. When gas is under a low pressure, the particles will collide with each other less often resulting in fewer effective collisions pre second.
4.2 Higher pressure - higher rate. When the pressure is high, the particles are crowded more closely together. The particles collide more often, resulting in many more effective collisions per second
5 Collision Theory LT
5.1 You may be asked to interpret information about the effect of changing temperature, concentration or pressure on a reaction. This could be in tables, graphs or a description.
5.2 You may be asked to sketch a graph showing the effect of changing variables. Such as temperature, pressure or concentration.
6 Collision Theory
6.1 Increasing temperature causes an increase in the kinetic energy of the particles, they move a lot faster. The faster the particles move, the number of collisions per second increases. The more collisions there are between particles, the faster the reaction.
6.2 When the particles collide at an increased temperature they have more energy. When a collision has more energy, the chance of it causing a successful collision is increased.
Show full summary Hide full summary

Similar

Tests for Positive Ions: Flame Test Colours
bella.mort
Acids and Bases
Sarah Egan
Using GoConqr to study science
Sarah Egan
Acids and Bases quiz
Derek Cumberbatch
Ionic Bondic Flashcards.
anjumn10
Electrolysis
lisawinkler10
Chemistry Quiz General -3
lauren_johncock
Chemistry General Quiz - 2
lauren_johncock
AS Chemistry - Enthalpy Changes
Sarah H-V
Acids and Bases
silviaod119
The Periodic Table
asramanathan