Search Results

Mass Grade 10 SABIS SABIS A measure of the amount of matter in an object, usually measured in grams or kilograms.

Condensation ​ ​ The process of a substance changing from a gaseous to a liquid state at a specific temperature.

Bond Energy Grade 10 SABIS ​ 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.

Sublimation ​ ​ The process of a substance changing directly from a solid to a gaseous state at a specific temperature.

Effect of changing surface area on rate of reaction: Grade 10 SABIS ​ if one of the reactants is a solid, the more divided or broken it is, the larger is its surface area and the more particles will be in contact with the other reactant. This leads to particles colliding more frequently and so the rate increases.

< Back Chapter 3: Acids and Bases Dive into the world of acids and bases and discover the properties and reactions of different acids and bases. Chapter 3: Acids and Bases - This chapter covers the properties of acids and bases and their behavior in aqueous solution. Students will learn about pH, pOH, acid-base titrations, and buffer solutions. The chapter also covers the different theories of acid-base behavior and the strengths of acids and bases. Previous Next

Coefficient Grade 10 SABIS SABIS The number preceding the chemical symbol and indicating the quantity of particles

6. The process of cooling liquid paradichlorobenzene until it Grade 10 SABIS SABIS

< Back A level Analytical techniques ​ ​ Previous Next

Freezing/Solidification ​ ​ The change of a substance from a liquid to a solid state at a specific temperature.

Sublimation of iodine Grade 10 SABIS SABIS Endothermic

Electrical Work Grade 10 SABIS ​ Electric work is the energy supplied by an electric current. In thermochemistry, it refers to the energy transfer that occurs during an electrochemical reaction or when electrical energy is used to perform work. To understand electric work, let's consider an everyday example: charging a mobile phone. When you connect your phone to a charger, electrical energy flows from the power source to the phone's battery. This energy transfer allows the battery to store electrical energy, which can later be used to power the phone and perform various tasks. Similarly, when you plug in an electrical device such as a laptop or a blender, electric work is done to power the device and enable its functionality. The electrical energy supplied through the power cord allows the device to operate and perform the desired tasks. In thermochemistry, electric work is involved in various electrochemical processes. For instance, during electrolysis, an electric current is passed through a solution or molten compound, causing a chemical reaction to occur. This reaction is driven by the electric work performed, leading to the separation or deposition of substances. Consider the process of electroplating, where a thin layer of metal is deposited onto an object. By passing an electric current through a solution containing metal ions, the metal ions are reduced and form a solid metal layer on the object's surface. The electrical work is responsible for driving this electrochemical process. Electric work is also crucial in battery technology. When a battery is used to power a device, such as a flashlight or a remote control, electric work is done as the chemical reactions inside the battery generate an electric current. This current supplies the necessary energy for the device to function. In summary, electric work in thermochemistry refers to the energy transfer that occurs during electrochemical reactions or when electrical energy is used to perform work. Examples include charging a mobile phone, operating electrical devices, electrolysis, electroplating, and battery-powered devices. Understanding electric work helps explain the energy transformations involved in various electrochemical processes and the role of electrical energy in powering everyday devices.