Uldilges of State
Grade
1 The equations below show four processes that use water as a starting material. (4-6)
A: H20, → H2O
B: 21,0 + 2Nao → 2NaOH(aq + H26)
C: H20, → +H20) D: 24,0 → 2H260) + O2(8)
a) State which equation shows evaporation.

Explanation:

Evaporation is a phase change from liquid to vapor. The right equation must show this change.

During evaporation, liquid acquires more heat energy and changes to gaseous form. In such processes, the molecules of the liquid break lose and becomes gases that are randomized.

            H₂O    →   H₂O

The expression above clearly shows water going from liquid to solid.

This should help to have a glimpse of how to solve this problem since the options are poorly written.    

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