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How could you prove that grinding a bar of iron into a powder is not a chemical change?
Grinding a bar of iron into a powder is a physical change, not a chemical change. This is because the iron is still the same substance, just in a different physical form. No new substances are formed during the grinding process, demonstrating that it is a physical change.
Is making iron into a magnet a physical change?
To make an iron bar into a magnet you need to get a bar magnet and stroke the iron one way when you get to the end of iron take the magnet off and jump it back to the start and stroke repeat this several times and your bar will soon become magnetic. This is only temporary, therefore the iron will become normal after the magnetic field rubs off. This means that making iron into a magnet is indeed a physical change.
Is melting a candy bar a chemical change?
Melting a candy bar is a physical change because it is just changing form, not changing the chemical makeup. (If it isn't making a new material, it is not a chemical change)
Is digestion of a candy bar a physical change or chemical change?
Chemical property
If a metal bar glowed red hot in a fire would it be a chemical change?
Yes, the metal bar undergoing a color change due to heating in a fire is a physical change, not a chemical change. Chemical changes involve the formation of new substances with different chemical properties. Heating a metal bar until it glows red hot does not alter its chemical composition.
Is heating a bar magnet chemical or physical change?
Heating a bar magnet is a physical change because the magnet does not undergo a chemical reaction. The heat energy causes the atoms in the magnet to vibrate, which disrupts the alignment of the magnetic domains within the magnet, thereby reducing its magnetic strength.
Is cutting a bar of sodium metal with a knife a chemical change?
Yes, cutting a bar of sodium metal with a knife is a physical change, not a chemical change. The chemical composition of the sodium metal remains the same before and after cutting. The change is only in the physical state of the metal.
When a chocolate bar melts in the sun a physical or chemical change?
When a chocolate bar melts in the sun, it is a physical change. This is because the chocolate undergoes a phase change from a solid to a liquid without changing its chemical composition.
When a chocolate bar melts in the sun is it a chemical or physical change?
Physical because on the appearance of the chocolate bar changed
Is forming a bar of gold into wire a chemical change or a physical change?
Forming a bar of gold into wire is considered a physical change. This is because the gold's chemical composition remains the same during the process, only its physical shape is altered.
Is a iron bar a insulator or a conductor?
A iron bar is a conductor
Is an iron bar a conductor or an insulator?
A iron bar is a conductor
