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If Mercury expands because its temperature is increased, there is no chemical reaction; this is a physical change. If there is any chemical change in the expansion of mercury, it must be due to the formation of some new compound, so that at least part of what is expanding is not mercury any longer but is now something else.
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Is mercury expanding in a thermometer a chemical or physical change?
Physical. The mercury doesn't change.
What is mercury used for in a thermometer?
The thermal expansion of mercury is proportional and linear to temperature.
What is the equation for the chemical reaction HgI?
HgI is not a chemical reaction, it is the empirical formula for the compound Mercury (I) iodide, Hg2I2
When heatedmercury(II) oxide reacts to mercury and oxygen?
When heated, mercury(II) oxide decomposes into mercury and oxygen gas. This is a chemical reaction where mercury(II) oxide undergoes thermal decomposition. The balanced chemical equation for this reaction is: 2HgO(s) → 2Hg(l) + O2(g)
Is oxidizing Mercury physical or chemical change?
Both. A chemical reaction occurs & a physical change is noticeable.
What energy can be converted to what energy when mercury oxide is heated please help fast?
Metallic mercury has chemical potential energy, since it can combine with oxygen in an exothermic reaction, therefore, by driving out the oxygen with heat, you are converting heat energy to chemical potential energy.
Is oxidizing mercury a physical or chemical change?
Oxidizing mercury is a chemical change because it involves a rearrangement of atoms in the mercury molecules to form new compounds (such as mercury oxide). This results in a change in the chemical composition of the substance.
What chemical reaction occurs when ammonium dichromate and mercury thiocyanate are combined?
When ammonium dichromate and mercury thiocyanate are combined, a chemical reaction called a decomposition reaction occurs. This reaction produces a visually striking effect known as the "Pharaoh's serpent" or "Pharaoh's snake," where a dark, coiling mass of solid material is formed.
Is heating mercuric oxide a physical or chemical change?
This is a chemical reaction; oxygen is released.
What is the product when mercury combines with sulfur?
Mercury and sulfur combine to form mercury(II) sulfide, which is a black compound. The chemical equation for this reaction is: Hg + S → HgS
What will be the chemical reaction after heating HgO?
Heating mercury(II) oxide (HgO) will cause it to decompose into mercury and oxygen gas. The chemical reaction is as follows: 2HgO(s) -> 2Hg(l) + O2(g)
What is the mechanism behind the decomposition of mercury II thiocyanate?
The decomposition of mercury II thiocyanate is a chemical reaction that involves the breaking down of the compound into mercury sulfide, carbon disulfide, and nitrogen gas when heat is applied. This reaction is a decomposition reaction, where the compound breaks down into simpler substances.
