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Are phase changes physical or chemical in nature?
Phase changes are physical changes in nature. They involve a change in the state of matter (solid, liquid, gas) rather than a change in the chemical composition of the substance. Heating or cooling a substance can trigger phase changes.
What does physical and chemical change have in common?
A physical change to an object is a change in properties not involving the chemical makeup. In other words, a physical change is any change you can make to an object without changing the actual substance. (I.e. state of matter, size, shape, color . . .etc.) A chemical change is a change that forms a new substance through a chemical reaction. A chemical reaction is often signaled by bubbling or fizzing, but the only real way to prove a chemical reaction is by coming up with a new substance. So physical changes leave you with the same substance (slightly altered in appearance/texture etc.), but chemical reactions give you a new substance.
Why can some changes to substances be reversed while others cannot?
Some changes can be reversed because they are physical changes that do not alter the chemical composition of the substance. For example, melting and freezing are reversible changes because the substance remains the same chemically. On the other hand, irreversible changes usually involve chemical reactions that create new substances, making it difficult or impossible to revert back to the original state.
Can sugar turn universal indicator red?
Yes, sugar is a neutral substance and will not change the color of universal indicator. Universal indicator changes color in response to changes in pH, indicating the acidity or alkalinity of a solution. Sugar does not alter the pH of a solution significantly.
Is copper sulphate a physical change?
Copper sulfate dissolving in water is a physical change because the chemical composition of copper sulfate remains the same. Physical changes do not alter the chemical structure of a substance.
What properties refer to a substance's ability to undergo changes that alter its composition and identity?
Chemical properties refer to a substance's ability to undergo changes that alter its composition and identity. These changes often involve the breaking and forming of chemical bonds within the substance.
Can a physical change what a substance is?
No. The whole idea of a physical change is one which does not alter the nature of the substance.
Can a physical change change what a substance?
No. The whole idea of a physical change is one which does not alter the nature of the substance.
Can a physical change change what a substance is?
a physical change will only alter the appearance but will NOT change the substance to another substance =)
Can a physical change change what a substances is?
No. The whole idea of a physical change is one which does not alter the nature of the substance.
Are reversible changes and physical changes the same?
Reversible changes and physical changes are not exactly the same. Reversible changes can be undone and the original substance can be recovered, while physical changes alter the appearance or state of a substance without changing its chemical composition. Physical changes are usually reversible, but not all reversible changes are physical changes.
What it called when a wave passes through a substance?
When a wave passes through a substance, it gets transmitted through it. The speed of the wave changes depending on the nature of the substance.
What is the name of a change that does not result in a new substance?
These changes are of physical nature as boiling, freezing, sublimation.
What is the difference between physical and chemical change?
In a physical change the nature of the substance has not changed, just the way it looks, feels or tastes. Examples of physical changes are: glass breaking, water changing into ice, whipping cream. In chemical change the nature or chemical composition of the substance is changed. Examples of chemical change are: iron changing to rust, burning leaves, food spoiling.
What kind of changes in substances are always physical changes?
The kinds of changes in substances that are always physical changes are changes in the state. This is the change from solid, to liquid and then to gas and the reverse.
Why rotting wood is a chemical change?
Rotting wood is a chemical change because the decomposed wood has different properties that cannot be reversed. Chemical changes alter the identity of a substance, whereas physical changes do not.
What are the factors that affect on rate of specific gravity?
The factors that affect specific gravity include temperature, pressure, and the density of the substance being measured. Temperature changes can cause the volume of a substance to expand or contract, affecting its specific gravity. Pressure changes can also alter the density of a substance, impacting its specific gravity measurement.
