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What are three differences between physical and chemical changes?
(i) Physical change does not result in formation of new substances Chemical change result in formation of new substances (ii) Physical change is a temporary change Chemical change is a permanent change (iii) Physical change is reversible Chemical change cannot be reversed back (iv) e.g of Physical change-Dissolving of sugar in water to obtain a sugar solution e.g of Chemical change-Burning of sodium in chloride
Is Epsom salt and ammonia a physical or chemical change?
Mixing Epsom salt and ammonia would result in a physical change. It is considered physical because no new substances are formed during the mixing process.
Is mixing elmers glue and liquid starch a chemical change?
No, mixing Elmer's glue and liquid starch is a physical change. A chemical change involves the formation of new substances with different chemical properties, while mixing these two substances does not result in a chemical reaction.
Which is not proof that a chemical change has occurred?
Change in color is not proof that a chemical change has occurred. A change in color can sometimes be the result of a physical change without any new substances being formed.
Does a chemical reaction change physical properties or chemical?
A chemical reaction changes the chemical properties of substances involved by forming new substances with different chemical compositions. This can result in changes in physical properties such as color, temperature, odor, and state of matter.
Is heating a chemical or physical change?
Heating a substance can result in either a physical change or a chemical change. A physical change does not alter the substance's composition, such as melting or boiling, while a chemical change leads to the formation of new substances with different properties, such as burning or baking.
What is The new and different substances formed as a result of a chemical change?
The new and different substances formed as a result of a chemical change (reaction) are the products of the reaction.
Difference between physical and chemical change?
Physical changes result in a change in appearance or physical state without forming new substances, such as melting ice or breaking a glass. Chemical changes involve the rearrangement of atoms to form new substances with different chemical properties, like burning a piece of paper or rusting of iron.
What methods do scientist use to determine if it is a physical or chemical change?
Scientists distinguish between physical and chemical changes by examining if the change affects the chemical composition of the substances involved. Physical changes alter the appearance or state of a substance without changing its chemical makeup, while chemical changes result in the formation of new substances with different chemical properties through chemical reactions. Techniques such as observing color changes, production of gas, formation of a precipitate, or changes in temperature can help scientists identify whether a physical or chemical change has occurred.
Is shredding a newspaper a result of a chemical property?
No, shredding a newspaper is a physical change, not a chemical property. Chemical properties describe how a substance reacts with other substances to form new substances, while shredding a newspaper only changes its physical form without altering its chemical composition.
What is the end result in a chemical change?
In a chemical change, the end result is the formation of new substances with different chemical properties from the original substances. Bonds between atoms are broken and new bonds are formed, resulting in a chemical transformation.
What is the difference between chemical from physical change?
Chemical changes result in the formation of new substances with different chemical properties, while physical changes do not change the chemical composition of the substance. In a chemical change, bonds are broken and new bonds are formed, leading to a different chemical structure. On the other hand, physical changes involve a change in appearance, state, or size of a substance without altering its composition.
