Which equation shows a physical change?

Pb (NO3) 2 (aq) + 2KI (aq) _ 2KNO3 (aq) + PbI2 (s)

HCl (aq) + NaOH (aq) _ NaCl (aq) + H2O (l)

2H2O (l) _ 2H2 (g) + O2 (g)

H2O (g) _ H2O (s)

Question

Chemistry

Makena Mullen

4 April, 06:44

Which equation shows a physical change?

Pb (NO3) 2 (aq) + 2KI (aq) _ 2KNO3 (aq) + PbI2 (s)

HCl (aq) + NaOH (aq) _ NaCl (aq) + H2O (l)

2H2O (l) _ 2H2 (g) + O2 (g)

H2O (g) _ H2O (s)

+2

Answers (1)

Know the Answer?

Missy · Answer 1

H2O (g) - - > H2O (s)

This is the change of phase from gas to solid, which is a physical change.

The other equations correspond to chemical changes given that the origin subtances are forming different substances

Which equation shows a physical change?Pb (NO3) 2 (aq) + 2KI (aq) _ 2KNO3 (aq) + PbI2 (s)HCl (aq) + NaOH (aq) _ NaCl (aq) + H2O (l)2H2O (l) _ 2H2 (g) + O2 (g)H2O (g) _ H2O (s)

Which equation shows a physical change?

Pb (NO3) 2 (aq) + 2KI (aq) _ 2KNO3 (aq) + PbI2 (s)

HCl (aq) + NaOH (aq) _ NaCl (aq) + H2O (l)

2H2O (l) _ 2H2 (g) + O2 (g)

H2O (g) _ H2O (s)