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

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)

anonymous · Answer

@BulletWithButterflyWings @e.cociuba

anonymous · Answer

@abb0t

abb0t · Answer

@BulletWithButterflyWings

anonymous · Answer

@grgrlee @Gin_Ichimaru @GOODMAN @LaynaMae @Loser66

e.cociuba · Answer

H2O(g) → H2O(s). You can see here that you are converting from a gas to a solid. This is a physical change. It's converting steam to ice.