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f406f7c0-d41d-43f1-89d7-4c7027b4a3e2 Collision Theory: SABIS Summary 1) For a reaction to proceed, particles of reactants must collide with one another.2) Particles must collide with the minimum amount of energy needed to react called the activation energy. Such collisions are called effective or successful collisions.3) To increase the rate of a chemical reaction, it is required to increase the frequency of effective collisions, i.e increase the number of successful collisions per unit time.

< Back Equilibria Previous Next 🔬 Chapter 8: Equilibrium 🔬 Learning Outcomes 🎯:Explain what is meant by a reversible reaction and dynamic equilibrium.State Le Chatelier’s principle and apply it to deduce qualitatively the effect of changes in temperature, concentration, or pressure on a system at equilibrium.State whether changes in temperature, concentration, or pressure or the presence of a catalyst affect the value of the equilibrium constant for a reaction.Deduce expressions for equilibrium constants in terms of concentrations (Kc) and partial pressures (Kp).Calculate the value of equilibrium constants in terms of concentrations or partial pressures and the quantities of substances present at equilibrium.Describe and explain the conditions used in the Haber process and the Contact process.Show understanding of, and use, the Brønsted–Lowry theory of acids and bases.Explain qualitatively the differences in behavior between strong and weak acids and bases and the pH values of their aqueous solutions in terms of the extent of dissociation. Reversible Reactions and Dynamic Equilibrium 🔄:A reversible reaction is one in which the products can change back to reactants.Chemical equilibrium is dynamic because the backward and forward reactions are both occurring at the same time.A chemical equilibrium is reached when the rates of the forward and reverse reactions are equal. Le Chatelier’s Principle 📊:Le Chatelier’s principle states that when the conditions in a chemical equilibrium change, the position of equilibrium shifts to oppose the change.Changes in temperature, pressure, and concentration of reactants and products affect the position of equilibrium. Equilibrium Constants (Kc and Kp) 🧮:For an equilibrium reaction, there is a relationship between the concentrations of the reactants and products which is given by the equilibrium constant K.Equilibrium constants in terms of concentrations (Kc) and partial pressures (Kp) can be deduced from appropriate data. Brønsted–Lowry Theory of Acids and Bases 🧪:The Brønsted–Lowry theory of acids and bases states that acids are proton donors and bases are proton acceptors.Strong acids and bases are completely ionized in aqueous solution whereas weak acids and bases are only slightly ionized.Strong and weak acids and bases can be distinguished by the pH values of their aqueous solutions.🔍

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c28268ed-a660-4439-b98b-35fcea25df41 Bond Energy Summary Bond energy refers to the amount of energy required to break a chemical bond between atoms or molecules. When atoms or molecules come together to form a bond, energy is released. Conversely, breaking a bond requires an input of energy.Imagine holding two magnets together. The energy you need to separate them represents bond energy. Similarly, when you pull apart two Lego blocks connected by studs, it requires energy to break the bond holding them.Forming a bond involves the attraction and sharing or transfer of electrons between atoms or molecules. This process releases energy. For example, when two puzzle pieces fit perfectly and snap together, the energy released represents bond formation .In a chemical reaction, the overall energy change is related to bond energy. When bonds are broken in reactant molecules, energy is absorbed. On the other hand, when new bonds are formed in the product molecules, energy is released. The difference between the energy absorbed and the energy released represents the bond energy change during the reaction.For instance, in a combustion reaction, such as the burning of gasoline, the energy released is due to the breaking of bonds in the reactant molecules (fuel and oxygen) and the formation of new bonds in the product molecules (carbon dioxide and water).Bond energy is an important concept in understanding the stability of molecules and the energy changes associated with chemical reactions. It helps explain why certain reactions release energy (exothermic) and others require energy input (endothermic). By studying bond energy, scientists can better understand the behavior of chemicals and design reactions for specific purposes.

2192e329-1e7b-4e63-b01c-7761fb905f9b Stoichiometric Calculations with Limiting Reagent Summary Solve stoichiometric calculation questions involving a limiting reagent

Explain the Changes of state in terms of the Kinetic Theory Trending Now The 60-Day IGCSE Organic Chemistry Challenge DAY 1 Free Preview The 60-Day IGCSE Organic Chemistry Challenge DAY 2 Free Preview IGCSE CHEMISTRY CAMBRIDGE 1.Particulate Nature of Matter 1.3 Heating Curve Back to Chapter 1 Menu Notes : Heating and Cooling curves are Graphs that show how matter acts when changing the temperature and at which state substance is available versus time Changes of states can be explained by using the idea that particles are constantly in motion . This is called the kinetic particle theory we can explain a heating curve using ideas about the energy and motion of the particles. Heating Curve At point A Physical status is Solid From A to B increasing heat energy increases vibration of the solid particles so the temperature of the solid increases From B to C increasing the heat weakens the forces of attraction between particles so they begin to slide over each other . there is no temperature change because all energy supplied is used to overcome the forces between the particles instead of raising the temperature . the substance melts At C , the substance is all at liquid state. From C to D : increasing the energy increases the motion of the particles in the liquid so the temperature of the liquid increases. From D to E : forces of attraction between liquid particles weakens to particles start to move away from each other . there is no temperature change as the energy supplied is used to break the forces between the particles , the substance boils . From E to F : increasing the energy increases the speed of the gas particles . so the temperature increases and the gas particles are getting far away from each other. Cooling Curve Almost opposite is happening List of Topics Download as PDF Trending Now The 60-Day IGCSE Organic Chemistry Challenge DAY 1 Free Preview The 60-Day IGCSE Organic Chemistry Challenge DAY 2 Free Preview K-Chemistry About US READ MORE

Alkanes may seem difficult at first. The nomenclature, the structures, the reactions - it can all be overwhelming. But don't let that discourage you. Because every great organic chemist started where you are. They faced the same challenges and setbacks, but they never gave up. They never let the complexity defeat them. < Back Alkanes Alkanes may seem difficult at first. The nomenclature, the structures, the reactions - it can all be overwhelming. But don't let that discourage you. Because every great organic chemist started where you are. They faced the same challenges and setbacks, but they never gave up. They never let the complexity defeat them. Files Download DAY 12 Notes Alkanes The IGCSE Organic Chemistry Challenge 2 .pdf Download PDF • 6.14MB Notes Topic Exercise Answers DAY 13 .14 HW part 1 and 2 Alkanes The IGCSE Organic Chemistry Challenge .pdf Download PDF • 14.40MB answers DAY 13 .14 HW part 1 and 2 Alkanes The IGCSE Organic Chemistry Challenge .pdf Download PDF • 17.28MB Videos Previous Next

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b569a744-45e8-4422-8ce9-e893eb959a02 The decomposition of water into H2 and O2 gas Summary Endothermic