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What effect does an energy change have on the identity of a substance?
Wiki User
∙ 10y ago
The identity of the substance reamain unchanged.
Tyreek Marquardt
Wiki User
∙ 14y agoBy definition, a physical change does not affect the identity of a substance. It only affects the substance's form. Only a chemical change would affect the identity of a substance.
Wiki User
∙ 12y agoYes, when a chemical is added or taken away, the overall substance changes identity. For example, adding oxygen (as fire) to carbon (as coal) one would produce carbon dioxide.
Wiki User
∙ 11y agoA chemical change which is a change in the composition and structure of molecules.
Wiki User
∙ 6y agoYes, it is true.
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What effects does an energy change have on the idenitity of a substance?
You do not change the identity of the materials.
What stays the same in a physical change?
The chemical nature/identity of the substance stays the same when a physical change takes place.
How does the energy of a substance change during an exothermic change?
During an exothermic change, such as freezing, the substance releases energy to its surroundings.
What has to be added to a substance to cause a phase change?
Heat energy must be added to or subtracted from a substance to cause a phase change.
What is the difference between endothemic and exothemic?
The difference is that the endothemic change is when energy is absorbed from the substance and exothermic change is when energy is removed or taken out of the substance.
What effects does an energy change have on the idenitity of a substance?
You do not change the identity of the materials.
What stays the same in a physical change?
The chemical nature/identity of the substance stays the same when a physical change takes place.
How does the energy of a substance change during an exothermic change?
During an exothermic change, such as freezing, the substance releases energy to its surroundings.
What has to be added to a substance to cause a phase change?
Heat energy must be added to or subtracted from a substance to cause a phase change.
What is the difference between endothemic and exothemic?
The difference is that the endothemic change is when energy is absorbed from the substance and exothermic change is when energy is removed or taken out of the substance.
What change when the amount of a substance change?
total thermal energy
What is the name of the energy needed to change a substance from a liquid to a gas?
The energy needed to change a substance from a liquid to a gas is called the enthalpy (or heat) of vaporization.
What does not change when a substance changes matter?
During a physical change, the matter of what the substance is made out of doesn't change.
What effect does observing a substance physical property have on the substance?
Physical Properties: The physical properties of a substance are those permanent properties which describe the physical characteristics of the material. Observation where possible, has no effect on the physical characteristic of the material.
A change of state in which energy is removed from a substance is called an?
A change of state where energy is removed from a substance is called an exothermic reaction. This chemical reaction releases energy in the form of light or heat.
How do energy and changes in energy change the state of matter?
When heating a substance the substance's molecules gain kinetic energy, this leads to chemical bonds being broken and thus a change of state.
Why does evaporation require that heat energy be added to a substance?
Heat is energy the substance needs to change it's state of matter (the more energy a substance has the higher it's temperature)
