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Physical & Chemical Changes

Physical & Chemical Changes. at the particulate level. E. Mylar Balloon. Physical or Chemical Change?. A.Fog in a Bottle. Physical or Chemical Change?. dust particle. water molecule. H 2 O (l). H 2 O (g). B. Dropper Bottles. Physical or Chemical Change?. Pb(NO 3 ) 2. KI. .

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Physical & Chemical Changes

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  1. Physical & Chemical Changes at the particulate level

  2. E. Mylar Balloon Physical or Chemical Change?

  3. A.Fog in a Bottle Physical or Chemical Change? dust particle water molecule H2O (l) H2O (g)

  4. B. Dropper Bottles Physical or Chemical Change? Pb(NO3)2 KI  2 KI (aq) + Pb(NO3)2 (aq)  2 KNO3(aq) + PbI2 (s)

  5. C. Iodine Physical or Chemical Change? I2 (s) I2 (g) I2 (s) The PHASE changes s  l l  s l  g g  l s  g g  s melt freeze boil condense sublime deposit

  6. D. Alka-Seltzer Physical or Chemical Change? CO2 NaHCO3 water molecule fizzing = effervescence

  7. F. Talking with SF6 Physical or Chemical Change? He= ~4 amu He N2 N2= 2 x ~14 amu = 28 amu air O2 O2= 2 x ~16 amu = 32 amu SF6= 32 amu+[6 x ~19 amu] = ~146 amu SF6 Particles with less mass vibrate faster across the vocal cords. Particles with more mass vibrate more slowly across the vocal cords.

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