Which of the following represents a physical change? A)CH₄(g)+ 2 O₂(g)→ CO₂(g)+ 2 H₂O(l) B)AgNO₃(aq)+ NaCl(aq)→ AgCl(s)+ NaNO₃(aq) C)N₂(g)+ 3 H₂(g)→ 2 NH₃(g) D)H₂O(s)→ H₂O(l)

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Choice D represents a physical change because the state of matter is changing from a solid to a liquid. Choices A, B, and C represent chemical reactions where the identity of the substances changes.

Which of the Following Represents a Physical Change