Applications of Thermodynamics
Considering a non-spontaneous electrochemical cell reaction, which change would make the process spontaneous at standard conditions?
Reversing the direction of the cell reaction.
Adding an inert electrolyte to increase the conductivity of the solution.
Decreasing temperature assuming that both enthalpy and entropy changes are positive.
Increasing the concentration of reactants and decreasing the concentration of products.
A chemist finds that adding inert helium gas into a sealed container conducting reversible synthesis-decomposition involving hydrogen iodide (HI_{(g)}⇌H_{(g)} + I_{(g)}) causes no visible effect on measured proportionate amounts each category has adjusted across newly established equilibriums afterward - why?
The additional He gas absorption lowers active participant concentrations indirectly speeding up atomic collisions necessary for promoting quicker reestablishment of altered states compared to the pre-intervention baselines accordingly overall.
Helium doesn't participate directly in chemical interactions nor impact total number particles, affecting neither volume nor partial pressures existing species present regardless overall pressure rise included along addition inert element itself inherently.
The presence of extra gas diversifies kinetic energies distributed among different types, altering the pathway activation needed to surpass energy barriers in transition phases effectively expediting any notable changes in equilibration pace generally expected under normal circumstances alike comparison to others of a similar nature that necessarily must be factored in the analysis perspective consideration.
Increasing the total number of molecules inside promotes expansion thus driving decomposition of HI favorably opposed to synthesis as suggested in the preceding context given the scenario to overcome otherwise stable standing arrangements outrightly.
Which quantity represents the number of moles of solute per liter of solution?
Molarity (M)
Normality (N)
Mass percent (%)
Molality (m)
How does coupling a non-spontaneous reaction (ΔG > 0) with a spontaneous one (ΔG < 0) in biological systems affect free energy change for overall processes?
The overall ΔG is averaged between two reactions leading to an intermediate value.
The overall ΔG becomes zero as both reactions neutralize each other's effects on free energy change.
The overall ΔG can become negative if coupled with a sufficiently exergonic reaction.
The overall ΔG remains positive since individual reactions preserve their own free energy changes.
According to the relationship between ΔG°, ΔG, and K, what happens when ΔG° increases?
K decreases
K increases
There is no effect on K or ΔG.
ΔG decreases
Which of the following is true about the relationship between the change in free energy (ΔG) and the temperature dependence of the equilibrium constant (K)?
The relationship between ΔG and the temperature dependence of K depends on the specific reaction.
ΔG has no effect on the temperature dependence of K.
A positive ΔG indicates that K increases as temperature increases.
A negative ΔG indicates that K decreases as temperature increases.
What happens to the spontaneity of a reaction when the Gibbs free energy (ΔG) is negative?
The reaction rate increases.
The reaction is nonspontaneous.
The temperature of the reaction decreases.
The reaction is spontaneous.

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If two moles of A reacts with one mole of B, what is the mole ratio of A to B used in calculations from their balanced equation, A + B → AB?
None because they do not combine stoichiometrically
1 : 1
2 : 1
1 : 2
The equilibrium constant expression Kp applies to reactions involving what states of matter?
Aqueous solutions
Solids
Liquids
Gases
Given a reaction mechanism with two steps, the first being slow and the second fast, which step would impact the overall free energy of activation for the process?
Both steps equally.
The second (fast) step.
The first (slow) step.
Neither step, as it is independent of speed.