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What makes up a chemical change?
A chemical change involves the formation of new substances with different chemical properties than the original ones. This can involve the breaking and forming of chemical bonds, resulting in a change in the composition and structure of molecules. Evidence of a chemical change includes the release or absorption of energy, color change, formation of a precipitate, or production of gas.
Write 3 differences between chemical and physical change?
Okay now here goes in a physical change no chemical reaction takes place. in chemical change chemical reactions take place. A physical change is reversible but a chemical change is not.In a physical change no new substance is formed(A+B=B) in a chemical change new substances are formed(A+B=C)
Classify the following as a chemical and physical changes 1cooking of food 2.freezing of water 3.drying of clothes 4.mixing of iron nails and sand?
With a physical reaction, some of the substance changes, but the stubstance is still the same. A chemical reaction on the other hand, is hard to reverse. Physical: freezing of water, drying of clothes, mixing of iorn nails and sand Chemical: cooking of food
Is producing something new a physical or a chemical change?
That depends on your definition of producing something new. If you cut lumber to build a table ... you have produced something new, but that is a physical change. Wood is still wood. But if you mean combining two or more substances, like hydrogen gas and oxygen gas, and, after burning, you form water, then that is a chemical change.
Is graphite lubricant a chemical or physical property?
The lubricating property of graphite is a physical property. The graphite does not undergo a chemical change when used as a lubricant.
What are 3 types of a chemical change?
It's irreversible,new substances are formed,a amount of heat is usu involved.
Is Buring wood a physical or chemical change?
It is a chemical change because the temperature changes, light is emitted, and there is a change in smell or taste. 3 signs of a chemical change.
Phsical or chemical change?
there are two changes in matter: physical change and chemical change. physical change means the change in size, shape, texture and any other physical characteristics, but no any new substance made or added. while in chemical change, there's a change in the object's physical appearance but also made a new substance.
What makes up a chemical change?
A chemical change involves the formation of new substances with different chemical properties than the original ones. This can involve the breaking and forming of chemical bonds, resulting in a change in the composition and structure of molecules. Evidence of a chemical change includes the release or absorption of energy, color change, formation of a precipitate, or production of gas.
How is energy stored in substances?
Energy can be stored in substances through chemical bonds, such as in the form of potential energy. When substances undergo chemical reactions, these bonds can be broken or formed, releasing or absorbing energy. Additionally, energy can be stored in substances in the form of kinetic energy, such as in the movement of particles within a substance.
Write 3 differences between chemical and physical change?
Okay now here goes in a physical change no chemical reaction takes place. in chemical change chemical reactions take place. A physical change is reversible but a chemical change is not.In a physical change no new substance is formed(A+B=B) in a chemical change new substances are formed(A+B=C)
What must you know if a chemical change occurs?
fizzingcolor change (of course, this exempts artificial coloring)odorformation of precipitateproduction of gasformation of new substance (elemental bonding)
What is the significance of a substance with a pH of 3 in chemical reactions?
A substance with a pH of 3 is considered acidic. This acidity can affect chemical reactions by influencing the rate and outcome of reactions. Acids can donate protons, which can react with other substances to form new compounds or change the properties of existing compounds. The pH level of a substance can therefore play a crucial role in determining how it interacts with other substances in chemical reactions.
Why do substances change?
is any subtanaces in 3 subtabtances
Classify the following as a chemical and physical changes 1cooking of food 2.freezing of water 3.drying of clothes 4.mixing of iron nails and sand?
With a physical reaction, some of the substance changes, but the stubstance is still the same. A chemical reaction on the other hand, is hard to reverse. Physical: freezing of water, drying of clothes, mixing of iorn nails and sand Chemical: cooking of food
Turning brownie mix into brownies chemical or physical change?
It is chemical i believe because it is changing its form. here's a tip if you do not no the difference between physical and chemical physical change: 1) atoms do not rearrange (switch patterns). 2)Only physical properties change. Chemical properties do not change. 3)phsical changes are generally easy to reverse. 4)no energy is produced by the substance. example: an ice cube (H20) melts in the sun and turns into water (H20) Chemical change 1)Atoms are rearranged into different molecules. There will be a new chemical formula. 2)both physical and chemical properties are changed. 3)changes are not reversible without another reaction. 4)energy is often produced (fire or heat) 0
Is mixing oil and water a chemical change?
Oil floating on water is not a "change", so asking whether it's a physical change or a chemical one is nonsense. To the extent there's any meaning at all to the question, it's a phenomenon caused by the physical properties of the two materials.
