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Is sugar crystallizing a physical or chemical change?
Sugar crystallizing is a physical change because it involves rearranging the molecules of the sugar without changing their chemical composition.
Is dissolving in water physical or chemical?
Dissolving in water is a physical change because it only involves the separation of molecules within a substance without changing their chemical composition.
What energy is required to create a phase change without changing the temperature?
The energy required to create a phase change without changing the temperature is known as latent heat. This energy is needed to break the intermolecular forces holding the molecules in a particular phase, such as solid to liquid or liquid to gas, without increasing the temperature of the substance.
When butter hardens is that a physical or chemical change?
When butter hardens, it is a physical change. The change in state from liquid to solid is a physical transformation, meaning that the molecules rearrange themselves without any change in their chemical composition.
Is liquid water changing to a solid water an example of physical change?
Yes because you can freeze water then you can melt it back to liquid water. And you can freeze it again. And melt it again. Ect. Improved answer - It is, because taking water and lowering the temperature to freezing levels causes the molecules to contract to the point where no movement is allowed, therefore solidifying it into a solid mass. When heated, it excites and causes the molecules to expand rapidly. Thus, evaporation.
Is sugar crystallizing a physical or chemical change?
Sugar crystallizing is a physical change because it involves rearranging the molecules of the sugar without changing their chemical composition.
How could you change an object's volume with out changing its mass?
Changing an object's volume without changing its mass can be achieved by altering its density. This can be done by increasing or decreasing the spacing between its molecules or particles, without adding or removing any material. For example, compressing a gas would decrease its volume without changing its mass.
Is a paper cut a chemical change?
No, it is a physical change, the paper's molecules are not changing.
Is changing direction really the same as changing speed?
No. It is possible to change direction without changing speed. However, it is not possible to change direction without changing velocity.
Is cutting hair a chemical change or physical change?
Cutting hair is a physical change because it does not alter the chemical composition of the hair. The cutting process only changes the physical appearance and length of the hair without changing its chemical structure.
How do the area and perimeter of the area of a figure change when it's dimensions change?
The answer depends entirely on how the dimensions change. It is possible to change the dimensions without changing the perimeter. It is also possible to change the dimensions without changing the area. (And it is possible to change the area without changing the perimeter.)
ice crystals forming on a window a chemical change?
No, ice crystals forming on a window is a physical change. A physical change involves a change in the form of a substance without changing its chemical composition. The water molecules in the air condense and freeze on the window, but they are still water molecules.
How can the volume of an object could change without changing it's mass?
The volume of an object can change without changing its mass if there is a change in its density. For example, if a material becomes less dense, the volume could increase while the mass remains the same. This can happen through physical or chemical changes that affect the arrangement of molecules within the object.
Is crystallization of copper sulphate a physical change?
Yes, crystallization of copper sulfate is considered a physical change. This process involves the copper sulfate molecules arranging themselves into a specific crystal lattice structure without changing their chemical composition. Therefore, it does not involve any chemical reactions.
Is dissolving in water physical or chemical?
Dissolving in water is a physical change because it only involves the separation of molecules within a substance without changing their chemical composition.
Is melting lard a chemical change?
No, it is a physical change because the chemical composition of the fat molecules are not changing.
What energy is required to create a phase change without changing the temperature?
The energy required to create a phase change without changing the temperature is known as latent heat. This energy is needed to break the intermolecular forces holding the molecules in a particular phase, such as solid to liquid or liquid to gas, without increasing the temperature of the substance.
