I have a homework question which asks:
The following changes do not always indicate a chemcial change. Give examples where they might indicate a physical change.
a. change in color
b. apparent loss of mass
c. apperent loss of a substance
PLEASE HELP
2006-09-02 06:24:13 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Change in color might accompany a concentration that results from loss of part of a solution or mixture, or it might be the result of the excitation of an electron and its subsequent return to base energy level with production of a photon.
Apparent loss of mass might be a phase change, i.e., boiling water loses apparent mass as steam escapes a beaker.
Apparent loss of a substance could be the result of a slightly soluble substance dissolving slightly in a liquid. There would be no loss actually, but it might appear so if one were to mix the two and then filter the insoluble part and re-weigh it.
2006-09-02 09:37:08 · answer #1 · answered by Black Dog 6 · 3⤊ 0⤋
Results Of A Physical Change
2016-11-14 12:52:53 · answer #2 · answered by ? 4 · 0⤊ 0⤋
A physical change is something that happens as you grow up a chemical change is a chemical reaction color, temperature,heat and shape i think so that's the difference
2016-03-17 01:21:13 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Both a and b most likely will be the result of a chemical change which results in a chemical change. It is not possible to assess "c" due to a lack of definition of substance.
2006-09-02 06:30:59 · answer #4 · answered by thebushman 4 · 1⤊ 0⤋
Apperent loss of mass.Change in color is a Chemical change.
2006-09-02 06:44:18 · answer #5 · answered by Anonymous · 0⤊ 1⤋
The change in color might be a physical change. The other two are certainly chemical changes.
2006-09-02 06:27:03 · answer #6 · answered by Anonymous · 1⤊ 0⤋
a. doppler shift
b. leaky balloon
c. Salt Shaker
2006-09-02 06:30:40 · answer #7 · answered by Anonymous · 2⤊ 0⤋