Search Results

Chemical Change Grade 10 SABIS SABIS Always produces a new kind of matter, is generally not easily reversible, is usually accompanied by considerable heat change, produces no observable change in mass

At RTP and STP, there are two liquid elements: bromine and mercury. Grade 10 SABIS ​

< Back A level Group 2 ​ ​ Previous Next

Know what nuclear reactions is, and that it changes mass to energy Grade 10 SABIS ​ Nuclear reactions involve processes that occur within the atomic nucleus, resulting in changes in the composition of atomic nuclei. These reactions can involve the transformation of one nucleus into another through processes such as nuclear fission or nuclear fusion. In nuclear reactions, the nucleus of an atom undergoes changes, typically by gaining or losing subatomic particles, such as protons or neutrons. These changes can lead to the formation of new isotopes or elements, accompanied by the release or absorption of a tremendous amount of energy. One of the fundamental concepts in nuclear reactions is the relationship between mass and energy. According to Einstein's famous equation, E = mc^2, energy (E) is equivalent to mass (m) multiplied by the speed of light squared (c^2). This equation demonstrates that mass and energy are interconvertible and can be transformed from one form to another. During nuclear reactions, a tiny fraction of the mass of the participating particles is converted into a significant amount of energy. This conversion occurs due to the difference in the total mass of the reactants and products before and after the reaction. In processes like nuclear fission, the splitting of a heavy nucleus into two or more lighter nuclei results in a slight decrease in total mass. This lost mass is converted into an enormous amount of energy, as dictated by Einstein's equation. Conversely, in nuclear fusion reactions, the combination of two light nuclei to form a heavier nucleus results in a slight increase in total mass. This increase in mass is compensated by the release of a substantial amount of energy. The conversion of mass to energy in nuclear reactions is governed by the principle of mass-energy equivalence. It highlights the tremendous energy potential contained within the nucleus of an atom, far exceeding the energy released in chemical reactions. The release of energy in nuclear reactions has significant implications in various fields, including nuclear power generation, nuclear weapons, and scientific research. Understanding the principles of nuclear reactions and the mass-energy relationship is crucial for harnessing nuclear energy responsibly and for advancing our understanding of the universe. It's important to note that nuclear reactions involve highly energetic and complex processes, requiring specialized knowledge and precautions to ensure safety and proper handling. These reactions are primarily studied and utilized in controlled environments by experts in the field. In summary, nuclear reactions involve changes that occur within the atomic nucleus, resulting in the transformation of one nucleus into another. These reactions demonstrate the interconversion of mass and energy, with a small fraction of mass being transformed into a substantial amount of energy. Understanding nuclear reactions and their ability to change mass to energy is essential in various scientific, technological, and energy-related applications.

< Back Chapter 9: Bonding in Solids and Liquids Discover the different types of bonding present in solids and liquids and how they affect the physical and chemical properties of materials. Chapter 9: Bonding in Solids and Liquids - This chapter covers the different types of bonding in solids and liquids. Students will learn about metallic bonding, ionic bonding, and covalent bonding. The chapter also covers the properties of solids and liquids, including viscosity and surface tension. Previous Next

< Back This is a Title 02 This is placeholder text. To change this content, double-click on the element and click Change Content. This is placeholder text. To change this content, double-click on the element and click Change Content. Want to view and manage all your collections? Click on the Content Manager button in the Add panel on the left. Here, you can make changes to your content, add new fields, create dynamic pages and more. You can create as many collections as you need. Your collection is already set up for you with fields and content. Add your own, or import content from a CSV file. Add fields for any type of content you want to display, such as rich text, images, videos and more. You can also collect and store information from your site visitors using input elements like custom forms and fields. Be sure to click Sync after making changes in a collection, so visitors can see your newest content on your live site. Preview your site to check that all your elements are displaying content from the right collection fields. Previous Next

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

Air Composition Grade 10 SABIS SABIS

RTP (Room Temperature and Pressure) Grade 10 SABIS SABIS A set of conditions close to room temperature (25°C) and atmospheric pressure used for experimental measurements.

< Back Hydrogen gas​ Part 1 Physical properties of hydrogen 1. Colorless odorless gas 2. Neutral to litmus 3. Less dense than air (so collected by upward delivery) 4. Insoluble in water (can be collected over water) 5. Highly flammable Reaction of Hydrogen Gas with Air Reacts with air violently (oxygen) when in contact with a flame. So it makes a squeaky pop with a lit splint 2H2(g) + O2 --> 2H2O Isotopes of Hydrogen Isotopes are atoms of the same element which have the same number of protons (atomic number) but different number of neutrons (mass number). Preparation of Hydrogen gas First : in Laboratory ​ 1-Preparing hydrogen from water or steam​ Addition of Very reactive metals (example potassium , Sodium , Lithium , Calcium) + liquid water gives hydrogen gas and metal hydroxide. or Addition of metals to steam to produce metal oxide and hydrogen gas 2- Preparing Hydrogen from acids​ Addition of moderately reactive metals like magnesium aluminum zinc or iron to dilute hydrochloric acid or sulfuric acid Note that less reactive metals can not be used to prepare the hydrogen with dilute acids generally metals which are less reactive than hydrogen can not be used Second : Industrially​ 1-Using hydrocarbons​ example by heating a hydrocarbon like methane with steam using a catalyst like nickel , the product is Carbon monoxide and hydrogen gas The carbon monoxide produced can be reheated with more steam using an iron oxide catalyst to produce Carbon dioxide and hydrogen gas 2-Using coke​ Coke is a fuel made of coal The coke is reacted with steam at high temperature (around 1000) degrees celsius to produce carbon monoxide gas and hydrogen gas 3-Using Electrolysis​ Electrolysis is the breakdown of a substance using electric current the water is broken down by electrolysis into hydrogen and oxygen Or the NaCl solution (brine) is broken down into chlorine and Hydrogen gases Previous Next

Heat Content (H) Grade 10 SABIS ​ The amount of potential energy stored in 1 mole of any substance. Heat content, also known as enthalpy, is a concept in thermochemistry that relates to the total energy contained within a substance. Think of heat content as the energy stored in your phone's battery. When the battery is fully charged, it contains a certain amount of energy, similar to the heat content of a substance. Imagine you have a cup of hot coffee. The heat content of the coffee represents the total energy stored in the liquid, which determines how hot it is. If you let the coffee sit for a while, it gradually cools down as it loses heat content to the surroundings. Now, consider a chemical reaction like burning a piece of paper. The heat content of the reactants (paper and oxygen) is different from the heat content of the products (ashes and carbon dioxide). The difference in heat content indicates how much energy is released or absorbed during the reaction . In everyday life, you can observe heat content changes when you cook food. As you apply heat to raw ingredients, their heat content increases, causing them to undergo chemical and physical changes. When you bake a cake, the heat content of the batter transforms it into a delicious dessert. Similarly, when you feel cold after getting out of a swimming pool, it's because the water on your body has a higher heat content than the surrounding air. As heat transfers from your body to the air, you feel a chill. The concept of heat content is essential in designing energy-efficient systems. For example, engineers consider the heat content of fuels when developing engines or power plants to maximize energy conversion. In summary, heat content is like the stored energy within a substance or system. It affects everyday situations like cooking, feeling cold after swimming, and energy conversions in engines. Understanding heat content helps us comprehend the energy changes that occur during chemical reactions and other processes in our daily lives.

Identify diagram of atoms and ions from a given list. Grade 10 SABIS ​