Disentangling the origin of chemical differences using GHOST
Chemical equations palak soni x b
1.
2. 2
Color
Melting Point
Boiling Point
Electrical Conductivity
Specific Heat
Density
State (Solid, Liquid, Or Gas)
3. 3
Changes In Physical Properties
Melting
Boiling
Condensation
No Change Occurs In The Identity Of The
. Substance
Example:
Ice , Rain, And Steam Are All Water
4. 4
Atoms in the reactants are rearranged to
form one or more different substances
Old bonds are broken; new bonds form
Examples:
Fe and O2 form rust (Fe2O3)
Ag and S form tarnish (Ag2S)
5. 5
A process in which at least one new
substance is produced as a result of
chemical change.
7. 7
Chemical symbols give a “before-and-after”
picture of a chemical reaction
Reactants Products
MgO + C CO + Mg
magnesium oxide to form carbon monoxide
reacts with carbon and magnesium
8. 4 NH3 + 5 O2 4 NO + 6 H2O
Four molecules of NH3 react with five molecules
O2 to produce four molecules NO and six
molecules of H2O
8
or
Four moles NH3 react with 5 moles O2 to produce
four moles NO and six moles H2O
9. Same numbers of each type of atom on each side
of the equation
9
Al + S Al2S3
2Al + 3S Al2S3 Balanced
10. 10
H2 + Cl2 2 HCl
+ +
Total atoms = Total atoms
2 H, 2 Cl 2H, 2 Cl
Total Mass = Total Mass
2(1.0) + 2(35.5) 2(36.5)
73.0 g = 73.0 g
11. In any ordinary chemical reaction, matter
is not created nor destroyed
11