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Question
Which of the following equations shows a chemical change?(1 point)
Responses
NH3(g)→NH3(l)
N H 3, which is a gas right-arrow N H 3, which is a liquid
C2H5OH(l)→C2H5OH(g)
C 2 H 5 O H, which is a liquid right-arrow C 2 H 5 O H, which is a gas
H2O(s)→H2O(g)
H 2 O, which is a solid right-arrow H 2 O, which is a gas
C3H8+5O2→3CO2+4H2O
1 answer
The equation that shows a chemical change is:
C3H8 + 5O2 → 3CO2 + 4H2O
This equation represents the combustion of propane (C3H8), resulting in the formation of carbon dioxide (CO2) and water (H2O), which indicates a chemical reaction where new substances are formed. The other options listed show physical changes (such as phase changes) rather than chemical changes.
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