Fill in the blank question about the cell voltage of a voltaic cell.

The cell voltage, E, is _________ for a reaction taking place in a voltaic cell. a. negative b. positive c. zero d. oxidative e. reductive

Multiple choice question about the effect on Gibbs free energy from increasing the reactant or product pressure.

In a gas phase reaction, what is the effect of increasing reactant or product pressure on the standard Gibbs free energy? a. it increases due to decreased entropy b. it decreases due to decreased entropy c. it increases due to increased enthalpy d. it may either increase or decrease e. it is unchanged

True or false questions about delta G and spontaneity.

Which of the following statements are FALSE? a. A reaction is spontaneous if delta G < 0 b. If delta G = 0, the system is at equilibrium c. If delta G = 0, the delta S = delta H d. If delta G > 0, then a reaction is not spontaneous e. Delta G is referred to as Gibbs free energy

Gibbs free energy

Which of the following are conditions for the standard Gibbs free energy? a. Ions or molecules in solution are present at one molar concentrations b. the temperature of the system is at 298K c. gases are present at one atmosphere partial pressure d. answers a and c are correct e. answers a, b, and c are correct

reactions

Calculate "delta" S for the following reaction: H2(g) + Br2(l) --> 2HBr(g) given: S[H2(g)] = 0.131 kJ/K S[Br2(l)] = 0.152 kJ/K S[HBr(g)] = 0.199kJ/K a. 0.482 kJ/K b. 0.681 kJ/K c. 0.115 kJ/K d. -0.084 kJ/K e. 0.084 kJ/K