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Worksheet Chem 160 Chapter 17: Thermodynamics: Entropy, Free Energy, and Equilibrium 1. What is a spontaneous process? What determines spontaneity? Define Gibb’s free energy, enthalpy, and entropy, and the relationship between them. 2. Predict the sign of ΔS in the following processes. Briefly explain your answer: a. 3 O 2 (g) ⇌ 2 O 3 (g ...
A summary practice problem set on chemical thermodynamics to cover examples of entropy changes, free energy, correlating ΔG, ΔS and ΔH.
Entropy. 1. Calculate the change in entropy of a large vat of molten copper when 50 J of energy is removed reversible from it as heat at 1100 °C. 2. Calculate the change in entropy of 1.0 L of water at 0 °C when it absorbs 235 J of energy from a heater.
Enthalpy, Entropy, and Free Energy Calculations. Can it be predicted if a reaction will occur? This is a question that can be answered by applying the principles of chemical thermodynamics, the study of the energy relationships associated with chemical reactions.
Complete the sentences below to create simply rules of thumb that will help you remember how to predict relative entropies. As the temperature of a system increases, the molar entropy of a compound increases. As the pressure of a system increases, the molar entropy of a compound decreases.
On the basis of enthalpy and entropy, predict whether each of the following reactions would be spontaneous, non-spontaneous or at equilibrium. a) N2(g) + 2O2(g) ⇄ 2NO2(g) ΔH = +67.7 kJ. Minimum enthalpy favours (reactants/products) Maximum entropy favours (reactants/products) Spontaneous . Non-spontaneous. Equilibrium .
Worksheet on Entropy and Free Energy. Define entropy in your own words, and list the variables or conditions that you must consider when comparing the entropy of two substances, or when trying to determine the relative change in entropy.
