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Explain why burining a candle is a chemical cange wile melting wax is a physical change?

Can you recover the original material(s) after the change without using chemical means? Burning - no. What was once the wax (and wick) now have different chemical compositions that cannot be recovered other than by chemical means. Thus, it's a chemical change. Melting - yes. The wax can be recovered without using chemical means. The melted wax is allowed to cool down, and this is a physical change, so the recovery is by physical means. Thus, it's a physical change. Tip: how do you reverse a change? That's the type of change it is.


If you need to reverse the following reaction in order for it to be an intermediate reaction in a Hess's law problem what would be the final value for the enthalpy of reaction you use for this interm?

To reverse a reaction in a Hess's Law problem, you must change the sign of the enthalpy change associated with that reaction. For example, if the original reaction has an enthalpy change of ΔH, the enthalpy change for the reversed reaction would be -ΔH. This means you would use the negative value of the original enthalpy change as the final value for the enthalpy of reaction for the intermediate.


What does irrevesible mean?

Irreversible means something that cannot be undone or reversed. It signifies a permanent change or condition that cannot be changed back to its original state.


Chemical changes can be reserved by physical change?

No, chemical changes cannot be reversed by physical changes. Chemical changes involve the formation of new substances with different properties, while physical changes only affect the state or appearance of a substance without changing its chemical composition. Once a chemical change occurs, it cannot be undone by a physical change.


How do you make a sentence with irreversible?

Irreversible means something cannot be reversed once it has been done.Asking people on Wiki.answers.com to do your homework can cause irreversible damage to your final grade when you can't do it on your own.


What does it mean to say a physical change is reversible?

A physical change is reversible if the substance can return to its original state after the change has occurred. This means that the change does not alter the chemical composition of the substance, allowing it to be reversed through processes like melting, freezing, or evaporation.


Is reversed and remanded the same in a decision?

No. Reversed means the verdict is "un-done". Remanded means it is sent back down to the lower court for a new decision.


A reversed polarity is when the hot and neutral are wired backwards?

Yes in AC circuits the terminology reversed polarity means the hot and neutral are reversed to what they should be. In DC circuits reversed polarity means that the positive and negative terminals are reversed to what they should be.


What does it mean to have a letter reversed on a brand?

it means crazy


What happens when the electric current is reversed on am electromagnet?

When the electric current is reversed on an electromagnet, the direction of the magnetic field is also reversed. This means that the north and south poles of the electromagnet switch places. This change in polarity can have various effects depending on the application, such as reversing the direction of motion in a motor or changing the direction of attraction or repulsion in a magnetic system.


What kind of things are irreversible?

Irreversible means unable to be undone or reversed. If something has done "irreversible damage", it means that the damage will not heal.


Is there a statute or citation which states reversed and dismissed means not guilty?

No.