Which of the following equations shows a chemical change?(1 point)

Question

Responses

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

C3H8+5O2→3CO2+4H2O

NH3(g)→NH3(l)
N H 3, which is a gas right-arrow N H 3, which is a liquid

H2O(s)→H2O(g)

Answer 1

The equation that shows a chemical change is:

C3H8 + 5O2 → 3CO2 + 4H2O

This reaction represents the combustion of propane (C3H8), where it reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). This is a chemical change because new substances are formed in the process.

The other equations represent physical changes (phase changes) rather than chemical changes.