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Gibbs Free Energy

Q. The equilibrium constant for a reaction is 0.45 at 25 °C. What is the value of ΔG° (kJ/mol) at this temperature? -4.2 4.2 170 2.0

Solved • Dec 1, 2019

Gibbs Free Energy

Q. The more negative Δ G° is for a given reaction, the larger the value of the corresponding equilibrium constant, K. True False

Solved • Dec 1, 2019

Gibbs Free Energy

Q. Calculating the Free-Energy Change under Nonstandard Conditions Which of the following statements is true? If Q = 0, the system is at equilibrium. The free-energy change for a reaction is independent of temperature. If Q>1, ΔG>ΔG∘. If a reaction is spontaneous under standard conditions, it is spontaneous under all conditions. The larger the Q, the larger the ΔG∘.

Solved • Dec 1, 2019

Heating and Cooling Curves

Q. Based on the following thermodynamic data, calculate the boiling point of ethanol in degrees Celsius.

Solved • Dec 1, 2019

Heating and Cooling Curves

Q. Glacial acetic acid is the concentrated form of acetic acid, the acid in vinegar. The term "glacial" refers to the appearance of the solid form, which resembles glacial ice. What is the melting point of this compound, in degrees Celsius, based on its thermodynamic data shown here?

Solved • Dec 1, 2019

Second and Third Laws of Thermodynamics

Q. If this substance is a perfect crystal at T=0 K, what is the value of S at this temperature?

Solved • Dec 1, 2019

Spontaneous Reaction

Q. Predicting and Calculating ΔG∘If a reaction is exothermic and its entropy change is positive, which statement is true? The reaction is non-spontaneous at all temperatures. The reaction is spontaneous only at higher temperatures. The reaction is spontaneous only at lower temperatures. The reaction is spontaneous at all temperatures.

Solved • Dec 1, 2019