Which balanced equation represents a chemical change?

(1) H2O (l) + energy → H2O (g)

(2) 2H2O (l) + energy → 2H2 (g) + O2 (g)

(3) H2O (l) → H2O (s) + energy

(4) H2O (g) → H2O (l) + energy

Question

20 February, 15:14

+2

Answers (1)

Know the Answer?

Kennedi Potts · Answer 1

Number 2. this is a chemical change cuz numbers 1, 3 and 4 are physical. So if you add the equation of 2 it has two molecules.

Which balanced equation represents a chemical change?(1) H2O (l) + energy → H2O (g)(2) 2H2O (l) + energy → 2H2 (g) + O2 (g)(3) H2O (l) → H2O (s) + energy(4) H2O (g) → H2O (l) + energy