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What is the measurement used to describe how much energy is produced or used during a chemical change?
The free energy (delta G) is the measure of the amount of energy produced or consumed in a reaction. Enthalpy (delta H) is a measure of the amount of heat produced or consumed in a reaction. These two quantities can sometimes be the same. When they are not, the other missing component where heat can be consumed or produced is work.
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Is heating KClO3 and MnO2 a chemical or physical change?
Heating KClO3 and MnO2 to form KCl and MnO2 is a chemical change as new substances are being produced.
What are the four clues to a chemical reaction?
heat is produced, light is produced, gas is produced, the chemicals change color.
Is mixing two substances and light is produced a chemical or physical change?
If light is produced when two substances are mixed, it is most likely a chemical change. Chemical changes involve the formation of new substances with different properties, whereas physical changes typically only affect the state or appearance of a substance without altering its chemical composition.
When a substance undergoes a phase change what occurs a particle change a chemical change a new substance is formed a physical change?
During a phase change, the substance transitions between different states of matter (solid, liquid, gas) without any change in the chemical composition of the particles involved. This means that there is no new substance formed and no chemical change taking place, it is solely a physical change.
Is reacts with acid to form H2 a chemical or physical properties?
This is a chemical property, as it involves a chemical reaction where hydrogen gas is produced when the substance reacts with an acid. Physical properties refer to characteristics such as color, state, density, and boiling point.
Does chemical change occur when a new substance is produced?
Chemical Change.
Sunlight produced into stored energy physical or chemical change?
chemical change
Is Gas produced from a reaction is a phase change and not a chemical change.?
A gas released during a chemical reaction is a chemical change.
What is produced as a result of chemical reactions?
Chemical change occurs
What is the new substance produced in a chemical change?
It depends , how many are produced .
Is a new substances produced in a chemical change?
It depends , how many are produced .
When wood is burned heat ash and smoke are produced . Describe this reaction and explain what type of change is occurring?
The reaction of the wood burning is Oxidation as wood combines with air, the type of change that is occurring is a chemical change.
What kind of change in a new substance being produced?
chemical change
What can be used to describe a chemical change?
A chemical equation can be used to describe a chemical change. For instance when iron combines with oxygen to form iron (III) oxide (rust), a chemical change has occurred. It can be written as a chemical formula: 4 Fe + 3 O2 --> 2 Fe2O3
How is change in heat calculated for a chemical reaction?
Using for the measurement a calorimeter.
Is it a physical or chemical change. Acids produced by bacteria in plaque cause teeth to decay?
This is a chemical change because the acids produced by bacteria in plaque are reacting with the minerals in the teeth, breaking them down and causing decay.
What kind of change result in new substance being produced?
chemical change
