AP Chemistry TSNF Day 6

If you use the value of 8.314 for R in the equation ΔG^o = −RT lnK, then what are the units for ΔG?

• kJ

• J

If a rxn with -dG does not proceed, what is a probable explanation?

• the activation energy is too low

• the activation energy is too high

• Q is too small

• S is too large

Tags

NGSS.HS-PS1-4

The oxidation number of hydrogen in NaH is

• +1

• -1

• 0

The oxidation number of oxygen in H₂O₂ is

• +1

• -1

• +2

• -2

Electrons in a battery flow in which direction?

• from cathode to anode

• from anode to cathode

Tags

NGSS.HS-PS2-5

In the salt bridge, which direction do the cations flow?

• to the cathode

• to the anode

While a battery is discharged, the mass of the _____________ increases.

• anode

• cathode

If you reverse AND double a redox reaction, what happens to the magnitude AND sign of E^o_cell ?

• nothing

• sign changes, magnitude does not

• sign changes, magnitude doubles

• sign stays the same, magnitude doubles

The half-reaction with a more (+) E^o_Red is the reaction that takes place at which electrode?

• anode

• cathode

Tags

NGSS.HS-PS2-5

If ΔG^o is (+) , then E^o_cell is

• positive

• negative

• zero