Enthalpy, Entropy, and Free Energy

Question 1

Calculate for this equation. Round to the nearest whole number. = J/K

Revolt · Accepted Answer

PENDING

Question 2

Calculate for the equation below.(Round to the nearest whole number.) = J/K

Revolt · Accepted Answer

PENDING

Question 3

Question 3

Revolt · Accepted Answer

130

Question 4

= kJ

Revolt · Accepted Answer

-958

Question 5

Is this reaction spontaneous or nonspontaneous?✔ spontaneousnonspontaneous

Revolt · Accepted Answer

spontaneous

Question 6

= kJ

Revolt · Accepted Answer

207

Question 7

Consider the spontaneous dissolution of NaCl in water: NaCl(s) → Na+(aq) + Cl −(aq) Predict whether the entropy change for this process is positive or negative and explain your answer. Then, predict whether the free energy change for the process is positive or negative and explain your answer.

Revolt · Accepted Answer

The entropy change (ΔS) for this process is positive. When a crystalline solid like NaCl dissolves, the ions move from a highly ordered solid lattice to a more disordered aqueous state, increasing randomness. The free energy change (ΔG) for this process is negative because it is described as a spontaneous process. For any process to be spontaneous at a given temperature and pressure, the change in Gibbs free energy must be less than zero (ΔG < 0).

Question 8

Is this reaction spontaneous or nonspontaneous?spontaneous✔ nonspontaneous

Revolt · Accepted Answer

nonspontaneous

Question 9

Does the spontaneity of this reaction depend on temperature?Yes, it is spontaneous only at high temperatures.Yes, it is spontaneous only at low temperatures.No, it is spontaneous at all temperatures.✔ No, it is nonspontaneous at all temperatures.

Revolt · Accepted Answer

No, it is nonspontaneous at all temperatures.

Question 10

Which of these ideas did you include in your answer?

Revolt · Accepted Answer

When a crystalline solid dissolves, it becomes more disordered.; When disorder increases, is positive.; This process probably has a positive .; The process is spontaneous.; Spontaneous processes have < 0; the process has a negative .

Enthalpy, Entropy, and Free Energy Answers

More from this Course

TRY EDGENUITY HACKS