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Question

H2O(l)H2O(g)
What type of change is represented by the equation above?
  1. This is chemical change because the equation is balanced.
  2. This is a physical change because the equation is balanced.
  3. This a physical change because the same compound is represented as both the reactant and product.
  4. This a chemical change because the same compound is represented as both the reactant and product.

A
This is chemical change because the equation is balanced.
B
This a chemical change because the same compound is represented as both the reactant and product.
C
This is a physical change because the equation is balanced.
D
This a physical change because the same compound is represented as both the reactant and product.
Solution
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Physical change as can be reserved by cooling.
there is no change in the chemical composition of the molecule, represented by the same molecular formulae.

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