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Compare the total amount of energy before and after physical and chemical changes?
In physical changes, the total amount of energy before and after remains the same as no new substances are formed. In chemical changes, there may be a difference in the total amount of energy before and after the reaction due to the formation of new substances and the breaking or forming of chemical bonds.
What happens when a substance undergoes a physical change?
During a physical change, the substance's chemical composition remains the same. It undergoes a change in physical properties such as shape, size, or state (solid, liquid, gas) without forming a new substance. Examples include melting, freezing, boiling, and dissolving.
What are physical and chemical changes and how are they the same and how are they different?
Physical changes are changes in something that affects the objects physical characteristics. Meaning things like the color, shape, amount. Example: cutting a piece of paper, painting a wall, etc. Chemical changes change what the object is made of. It can change everything, including the state the object(or liquid) is in.
How Does the total amount of matter in a substance increase decrease or stay the same after a chemical or physical change?
The total amount of matter in a substance remains the same after both chemical and physical changes. This is known as the Law of Conservation of Mass, which states that matter cannot be created or destroyed in a chemical reaction or physical change, only rearranged. So, the total mass of the substances before and after the change will be equal.
Is explode physical or chemical change?
Explode is a rapid physical change that occurs when substances release a large amount of energy in a short period of time, causing them to break apart or burst. It is not a chemical change because the substances involved do not undergo a change in their chemical composition during the process.
Compare the total amount of energy before and after physical and chemical changes?
In physical changes, the total amount of energy before and after remains the same as no new substances are formed. In chemical changes, there may be a difference in the total amount of energy before and after the reaction due to the formation of new substances and the breaking or forming of chemical bonds.
What happens when a substance undergoes a physical change?
During a physical change, the substance's chemical composition remains the same. It undergoes a change in physical properties such as shape, size, or state (solid, liquid, gas) without forming a new substance. Examples include melting, freezing, boiling, and dissolving.
What are physical and chemical changes and how are they the same and how are they different?
Physical changes are changes in something that affects the objects physical characteristics. Meaning things like the color, shape, amount. Example: cutting a piece of paper, painting a wall, etc. Chemical changes change what the object is made of. It can change everything, including the state the object(or liquid) is in.
Is reduction physical or chemical?
Reduction can involve both physical and chemical changes. In a chemical sense, reduction involves gaining electrons to form a lower oxidation state. In a physical sense, reduction can refer to the process of decreasing the size or amount of a substance.
Which property of a substance does not change when the amount of the substance changes?
All substances have distinct physical and chemical properties, and may undergo physical or chemical changes. Physical properties, such as hardness and boiling point, and physical changes, such as melting or freezing, do not involve a change in the composition of matter.
Is humidity a physical change?
Humidity itself is not a physical change, but a physical property of the air that can change based on temperature and pressure. Humidity represents the amount of water vapor present in the air, and can vary without altering the composition of the air itself.
How Does the total amount of matter in a substance increase decrease or stay the same after a chemical or physical change?
The total amount of matter in a substance remains the same after both chemical and physical changes. This is known as the Law of Conservation of Mass, which states that matter cannot be created or destroyed in a chemical reaction or physical change, only rearranged. So, the total mass of the substances before and after the change will be equal.
Is explode physical or chemical change?
Explode is a rapid physical change that occurs when substances release a large amount of energy in a short period of time, causing them to break apart or burst. It is not a chemical change because the substances involved do not undergo a change in their chemical composition during the process.
What changes when the amount of a substance changes?
When the amount of a substance changes, it can affect the concentration, density, and reactivity of the substance. In chemical reactions, changing the amount of a substance can also impact the equilibrium position and the rate of reaction. Additionally, changing the amount of a substance can influence its physical properties, such as melting point, boiling point, and solubility.
When is a reaction considered chemical?
A reaction is considered chemical when bonds between atoms are broken and new bonds are formed, resulting in a change in the chemical composition of the substances involved. Physical changes, on the other hand, do not involve changes in the chemical composition of the substances.
What does a solid always take up the same amount of space of?
A solid always takes up the same amount of space, or volume, unless it undergoes a physical or chemical change. This is due to the arrangement of particles in a solid being tightly packed and maintaining a fixed shape and volume.
Is petrol burning in an engine is it a physical changes?
No,it's a chemical change,because the petrol used can't reversible,also.A considerable amount of heat change is usually involved.
