(a)
Interpretation: The entropy changes in the given set of reactions have to be predicted to be positive or negative with explanation.
Concept Introduction: Entropy is a
(b)
Interpretation: The entropy changes in the given set of reactions have to be predicted to be positive or negative with explanation.
Concept Introduction: Entropy is a thermodynamic quantity, which is the measure of randomness in a system. The term entropy is useful in explaining the spontaneity of a process. For all spontaneous process in an isolated system there will be an increase in entropy. Entropy is represented by the letter ‘S’. It is a state function. The change in entropy gives information about the magnitude and direction of a process. During a phase transition, if the solid state is changed to liquid state or gaseous state there will be an in increase in entropy in the system. The solid state is having more orderly arrangement than the liquid and gaseous state. Gaseous state having more possible arrangements of atoms will have the highest order of entropy.
(c)
Interpretation: The entropy changes in the given set of reactions have to be predicted to be positive or negative with explanation.
Concept Introduction: Entropy is a thermodynamic quantity, which is the measure of randomness in a system. The term entropy is useful in explaining the spontaneity of a process. For all spontaneous process in an isolated system there will be an increase in entropy. Entropy is represented by the letter ‘S’. It is a state function. The change in entropy gives information about the magnitude and direction of a process. During a phase transition, if the solid state is changed to liquid state or gaseous state there will be an in increase in entropy in the system. The solid state is having more orderly arrangement than the liquid and gaseous state. Gaseous state having more possible arrangements of atoms will have the highest order of entropy.
(d)
Interpretation: The entropy changes in the given set of reactions have to be predicted to be positive or negative with explanation.
Concept Introduction: Entropy is a thermodynamic quantity, which is the measure of randomness in a system. The term entropy is useful in explaining the spontaneity of a process. For all spontaneous process in an isolated system there will be an increase in entropy. Entropy is represented by the letter ‘S’. It is a state function. The change in entropy gives information about the magnitude and direction of a process. During a phase transition, if the solid state is changed to liquid state or gaseous state there will be an in increase in entropy in the system. The solid state is having more orderly arrangement than the liquid and gaseous state. Gaseous state having more possible arrangements of atoms will have the highest order of entropy.
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Chemistry
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- What is the sign of the standard Gibbs free-energy change at low temperatures and at high temperatures for the synthesis of ammonia? 3H2(g) + N2(g) 2NH3(g)arrow_forwardWhat is meant by the standard free-energy change G for a reaction? What is meant by the standard free energy of formation Gf of a substance?arrow_forwardYeast can produce ethanol by the fermentation of glucose (C6H12O6), which is the basis for the production of most alcoholic beverages. C6H12O6(aq) 2 C2H5OH() + 2 CO2(g) Calculate rH, rS, and rG for the reaction at 25 C. Is the reaction product- or reactant-favored at equilibrium? In addition to the thermodynamic values in Appendix L, you will need the following data for C6H12O6(aq): fH = 1260.0 kl/mol; S = 289 J/K mol; and fG = 918.8 kl/mol.arrow_forward
- Consider the reaction of 2 mol H2(g) at 25C and 1 atm with 1 mol O2(g) at the same temperature and pressure to produce liquid water at these conditions. If this reaction is run in a controlled way to generate work, what is the maximum useful work that can be obtained? How much entropy is produced in this case?arrow_forwardFor each of the following processes, identify the systemand the surroundings. Identify those processes that arespontaneous. For each spontaneous process, identify theconstraint that has been removed to enable the process to occur: Ammonium nitrate dissolves in water. Hydrogen and oxygen explode in a closed bomb. A rubber band is rapidly extended by a hangingweight. The gas in a chamber is slowly compressed by aweighted piston. A glass shatters on the floor.arrow_forwardFor one day, keep a log of all the activities you undertake that consume Gibbs free energy. Distinguish betweenGibbs free energy provided by nutrient metabolism andthat provided by other energy resources.arrow_forward
- Enthalpy changes often help predict whether or not a process will be spontaneous. What type of reaction is more likely to be spontaneous: an exothermic or an endothermic one? Provide two examples that support your assertion and one counterexample.arrow_forwardDetermine whether each of the following statements is true or false. (a) An exothermic reaction is spontaneous. (b) When G° is positive, the reaction cannot occur under any conditions. (c) S° is positive for a reaction in which there is an increase in the number of moles. d) If H° and S° are both negative, G° will be negative.arrow_forwardWhat is entropy? Why is entropy important?arrow_forward
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