which of the following equations shows a physical change?
A ) CaCO3>CaO+CO2
B ) N2O5>NO2+O2
C ) H2O(s)>H2O(l)
D ) C12H22O11+12O2>12CO2+11H20
A physical change is a type of change where the form of matter is altered but one substance is not transformed into another. Among the provided options:
A) CaCO3 > CaO + CO2
This is a chemical change (calcium carbonate decomposes into calcium oxide and carbon dioxide when heated).
B) N2O5 > NO2 + O2
This is also a chemical change (dinitrogen pentoxide decomposes into nitrogen dioxide and oxygen).
C) H2O(s) > H2O(l)
This is a physical change (water changes state from solid (ice) to liquid).
D) C12H22O11 + 12O2 > 12CO2 + 11H2O
This is a chemical change (sucrose (C12H22O11) combusts in the presence of oxygen to produce carbon dioxide and water).
So, the equation that shows a physical change is:
C) H2O(s) > H2O(l)