U4 Chemical Rxns
This law explains why the number of atoms of each element remains the same before and after a reaction.
What is the Law of Conservation of Mass?
This number represents the number of particles in one mole of a substance.
What is Avogadro’s number (6.022 × 10²³)?
Freezing water is this type of process.
What is exothermic?
According to collision theory, particles must do this in order to react.
What is collide?
When pH and pOH are added, you get this number.
What is pH + pOH = 14?
When balancing a chemical equation, this is the part of a formula you are allowed to change.
What are coefficients?
The number of molecules in 2.25 moles of CO₂.
What is 1.35 × 10²⁴ molecules?
The name given to the measure of heat needed to raise 1 gram of a substance by 1°C
What is "specific heat capacity?"
Increasing temperature does this to the reaction rate.
What is increases the reaction rate?
pH of a solution with [H⁺] = 4.7 × 10⁻⁵ M.
What is 4.33?
This type of reaction is shown by: 2H₂O₂ → 2H₂O + O₂?
What is decomposition?
The molar mass of H2O.
What is 18 g/mol
Heat required to raise 250.0 g of water by 60.0°C. (c = 4.18 J/g°C) Q=mCT
What is 62,700 J?
This is the main function of a catalyst.
What is lowering the activation energy?
pOH of a solution with [OH⁻] = 3.2 × 10⁻³ M.
What is 2.49?
This type of reaction is shown by: C₃H₈ + O₂ → CO₂ + H₂O
What is combustion?
In the reaction 2Al + 6HCl → 2AlCl₃ + 3H₂, calculate the grams of AlCl₃ from 4 g Al.
What is 19.75 g of AlCl₃?
Specific heat of a metal if 1,050 J raises 70.0 g from 30°C to 60°C. C= Q/mT
What is 0.50 J/g°C?
For an exothermic reaction, increasing temperature causes the equilibrium to shift this direction.
What is toward the reactants?
If pH = 5.75, what is the [OH⁻]?
What is 5.62×10−9M
Balance this equation:
__Na + __Cl₂ → __NaCl
What is 2Na + Cl₂ → 2NaCl
(2,1,2)
In the reaction 2Al + 3Cl₂ → 2AlCl₃, how many moles of Cl₂ react with 3 moles of Al?
What is 4.5 moles of Cl₂?
If 3,000 J of heat is added to 60 g ethanol (C = 2.44 J/g°C), find the temperature change. T= Q/mC
What is 20.5°C?
For the reaction N₂ + 3H₂ ⇌ 2NH₃ + heat, increasing N₂ shifts equilibrium this way.
What is toward the products?
What is [H⁺] if pOH = 2?
What is 1.0×10−12M?