Balancing equations
If you have 4 oxygen atoms on the reactant side, how many must be on the product side?
4 oxygen atoms
a reaction that absorbs energy
What is an Endothermic Reaction?
Fe(2)O(2)
Fe + O(2)
Cu(s) + 2AgNO(3) a/q
Cu(NO[3])2 a/q + 2Ag(s)
AgNO(3) a/q + NaCl a/q
AgCl (s) + NaNo(3) a/q
What do you add in front of a compound to balance an equation?
What is a coefficient
a reaction that releases energy
What is an Exothermic Reaction?
Cl (2) + O(5)
Cl(2) + O(2)
Zn(s) +HCl(g)
ZnCl a/q + H(2)g
H(2)SO(4) + KOH
H(2)O + K(2)SO(2)a/q
What are the numbers at the bottom right of an element called?
Subscript
what the latin word "exo" means
What is outside?
H(2) + O(2)
O(2) + H(2)
2Br + 2BaI
I(2) + 2BaBr
Na(2)S a/q + HCl (a/q)
NaCl (a/q) + H(2)S a/q
Balance this equation: _H₂ + _O₂ → _H₂O
2H₂ + O₂ → 2H₂O
A chemical reaction occurs, and the temperature of the surroundings decreases. What type of reaction is this?
What is Endothermic Reaction
2ZnO
O(2) + 2Zn
Al + H(2) CO (2)
Al(CO3)(2) + H(2)
2Na(OH) + CuCl(2)
2NaCl(2) + Cu(OH)2
Balance the equation:
_C₃H₈ + _O₂ → _CO₂ + _H₂O
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
What type of reaction is used in hand warmers? Exothermic or Endothermic
What is Exothermic?
CaCO(3)
CaO + CO(2) g
Zn + 2HNO(2)
Zn(NO3)(2) + H(2)
NaCl + Pb(NO[3])(2)
PbCl + Na (NO[3])(2)