AP Chemistry Review 1

This electrode in a voltaic cell gains mass

• anode
• cathode

Reactions in voltaic cells are

• spontaneous, redox reactions
• non-spontaneous, redox reactions
• spontaneous, non-redox reactions
• non-spontaneous, non-redox reactions

In a voltaic cell, the half cell that receives anions from the salt bridge is

• cathode
• anode

Consider the following numbered processes:
1. A -> 2B
2. B -> C + D
3. E -> 2D
ΔH for the process A -> 2C + E is

• ΔH₁ + ΔH₂ + ΔH₃
• ΔH₁ + ΔH₂ 
• ΔH₁ + ΔH₂ - ΔH₃
• ΔH₁ + 2ΔH₂ - ΔH₃

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Consider the following processes:
I.  condensation of a liquid
II. increasing volume of an ideal gas at constant temp
III. dissolving sugar in water
IV. heating 1.0 mol of an ideal gas at constant volume
For how many of these is ΔS positive?

• 0
• 1
• 2
• 3

For the reaction A + B -> C + D, ΔH^ₒ = +40 kJ and ΔS^ₒ = +50 J/K. Therefore, the reaction under standard conditions is

• spontaneous at temps > 10K
• spontaneous at temps > 800K
• spontaneous at temps between 10K and 800K
• spontaneous at all temperatures

Which is most acidic?

• pH = 8.5
• [H₃O⁺] = 1 x  10^-13
• [H₃O⁺] = 1 x  10^-2
• pH = 3

step 1: O₃ → O₂ + O
step 2: O₃ + O → 2 O₂

The oxygen atom (O) is considered to be a(n)...

• reactant
• catalyst
• reaction intermediate
• activated complex

• rate = k[CO]²[O₂]²
• rate = k[CO]²[O₂]
• rate = k[CO][O₂]²
• rate = k[CO][O₂]^1/2

Tags

NGSS.HS-PS1-5

Which one of the following elements has the greatest ionization energy?

• Al
• Cl
• Br
• S

Tags

NGSS.HS-PS1-1