1. (2)What is the sign of the entropy change of the system (ΔSsys)(methanol (liq, at 290K) → methanol (g, at 400 K))? Provide a brief explanation.

Q: Determine the standard free energy change, ΔG°,

A: Δ G = Δ H − T Δ S  Δ H =  625.5 kJ  ∆S° = 450.0 J/K = 450 x 10-3 KJ/K T = 25.0°C + 273 = 298K

Q: For the process: Z₂(g) →2 Z(g), AH° = +478 kJ. What would be predicted for the sign of ASxn and the…

A: Given reaction: Z2(g) → 2Z(g),     ∆H∘ = +478 kJ We have to find the sign of ∆Srxn and the…

Q: Estimate the sign of the entropy change for the reaction: CACO3 (s) → CaO (s) + CO2 (g)

A: Given :-  CaCO3(s) → CaO(s) + CO2(g)  To be determined :- sign of ∆S (entropy change)

Q: What is the value of change in entropy at standard state and 25 degrees Celsius that accompanies the…

A: Recall the given reaction        C + CO2 → 2 CO So, change of enropy for this reaction is-…

Q: Ca(OH)2(aq) + 2HCl(aq)CaCl2(s) + 2H2O(l) for which H° = -30.20 kJ and S° = 205.9 J/K at 298.15 K.…

A:

Q: methanol, CH3OH, vaporizes at 25°C is 35.4 kJ/mol. What is the entropy change (in J/K) when one mole…

A: Given,   □Hvap = 35.4 kJ/mol T = 25 °c = 298 K □S = □H/T   = 35.4 ×1000/298 = 118.79 J/K-mol

Q: Determine the entropy change for the combustion of liquid ethanol, C2H5OH, under standard state…

A:

Q: Consider the reaction CH4(g) + H2O(g)CO(g) + 3H2(g) for which H° = 206.1 kJ and S° = 214.7 J/K at…

A:

Q: At what temperatures will a reaction be spontaneous if ΔrH° = +62.4 kJ and ΔrS° = +301 J/K?

A: The given values are: ∆rH°=+62.4 kJ=62400 J ∆rS° =+301 J K-1 For a reaction, the relation between…

Q: Given ΔHrxn∘= −135 kJ, ΔS∘rxn= −263 J/K, & T= 299 K, will the reaction be spontaneous?

A: Given: ΔHrxn∘= −135 kJ ΔS∘rxn= −263 J/K T= 299 K To find: Whether the reaction is spontaneous

Q: 9. A chemical reaction under standard state has the enthalpy of reaction: A,H° = +117 kJ and the…

A: B) The reaction is entropy driven.

Q: Calculate the entropy changes for the following processes: Melting of one mole of tin at its melting…

A: Entropy change of any process at constant temperature and pressure is given by  ΔS = Q / T where ΔS…

Q: Consider the reaction 6CO2(g) + 6H2O(l)C6H12O6 + 6O2(g) for which H° = 2.801×103 kJ and S° =…

A: The given reaction is, 6CO2(g) + 6H2O(l) → C6H12O6 + 6O2(g) Given that: H° = 2.801×103 kJ  S° =…

Q: For a reaction, ΔHrxn = -107 kJ and ΔSrxn = 285 J>K. At what temperature is the change in entropy…

A:

Q: Using the following data, give an approximation of the temperature at which the reaction CH4 (g) + 4…

A: According to second law of thermodynamics , entropy of a system always Increases. Or the value of…

Q: Which one of the following is not equal to zero?   A.  Standard molar entropy of a perfect crystal…

A: Standard enthalpy of formation of elements and the compounds in their standard state is zero.

Q: Calculate the change in entropy when one mole of metallic aluminum is heated at one bar pressure…

A: Enthalpy of fusion for 1 mole of Al is 10699.45 J/molInitial temperature = 25 degC = 298.15K KFinal…

Q: The following reaction for the formation of glucose from carbon dioxide and water:…

A: The given reaction is,

Q: Calculate the entropy of vaporization of water at 25 °c from thermodynamic data and its enthalpy of…

A: First calculate the entropy change of the given process at 25oC Given, The temperature of the system…

Q: Consider the reaction2HBr(g) + Cl2(g)2HCl(g) + Br2(g)for which H° = -81.10 kJ and S° = -1.200 J/K at…

A: All feasible reactions occurring in nature are either enthalpy/entropy driven or both. When heat…

Q: Consider the reaction CH4(g) + H2O(g)CO(g) + 3H2(g) for which H° = 206.1 kJ and S° = 214.7 J/K at…

A:

Q: Consider the reaction 6CO2(g) + 6H2O(l)C6H12O6 + 6O2(g) for which H° = 2.801×103 kJ and S° =…

A:

Q: For the chemical reaction Al203(s) + 3H2(g,p= 1 bar) → 2Al(s) + 3H2O(1) at T = 298 K, answer each of…

A:

Q: Which of the following processes are spontaneous and which are nonspontaneous:formation of CH4 and…

A:

Q: The entropy of reaction for XeF6 (g) ⇌ XeF4 (g) + F2 (g) is 49 J/mol·K.  If the equilibrium constant…

A: Feasibility of a reaction depends on the change in Gibbs free energy. The value of change in Gibbs…

Q: Determine the entropy change for the combustion of gaseous propane, C3Hg, under the standard…

A:

Q: Consider the reaction N2(g) + 2H2O(1)–→2NO(g) + 2H2(g) for which AH° = 752.2 kJ and AS° = 351.6 J/K…

A: The given reaction is : N2(g)  +  2H2O(l)  →  2NO(g)  +  2H2(g)For the above reaction :∆H°=752.2 kJ…

Q: calculate the free energy change (in kJ) of a reaction at 466.4K that has an entropy change of…

A: Given,    ΔS = 692.2 J/K   = 0.6922 kJ/K   ΔH = - 4.24 kJ    T = 466.4 K Free energy change ( ΔG )…

Q: What is the application of standard Gibbs free-energy to processes and reactions What is its…

A: Thermodynamics is the branch of chemistry which deals with the study of heat and other forms of…

Q: Suppose 20 g of ice at 0 °C is added to 300 g of water at 60 °C . What is the total change in…

A:

Q: Write T if true, and F if false 1. It is more convenient to use change in enthalpy, ΔH, as a…

A:

Q: 1. Calculate the standard entropy change for the following process: Ha(g) + C2Hag) → C2H6ig) 2.…

A: We have given that  Calculate the standard entropy change for the following process: H2(g) + C2H4(g)…

Q: How does the standard entropy of a substance depend on its molar mass? On its molecular complexity?

A: Entropy is a thermodynamic property, which is the measure of randomness of a system. Entropy of the…

Q: What is Gibbs free energy, and what is ΔG for a reaction, and what does it mean if ΔG is positive,…

A: Gibbs free energy : It is defined as the maximum reversible non-PV work that can be obtained from…

Q: 4. At what temperature the reaction becomes spontaneous? 5. The vant Hoff's equation works if…

A: The Vant't Hoff equation gives us the relation between standard Gibbs free energy change ∆G and…

Q: Under standard conditions, the products of a reaction have, overall, greater entropy than the…

A: Given that ∆S°products is greater than ∆S°reactants .

Q: Consider the reaction2HBr(g) + Cl2(g)= 2HCl(g) + Br2(g)for which H° = -81.10 kJ and S° = -1.200 J/K…

A: 1) since  S° = -1.200 J/K for the reaction of 2 moles of HBr  Hence for the reaction of 1 mole of…

Q: What should be the sign of EMF for the reaction to be considered spontaneous? Why?

A: The Gibbs free energy for a spontaneous reaction has a negative sign. ∆G = -ve for spontaneous…

Q: Consider the reaction Ca(OH)2(aq) + 2HCl(aq)CaCl2(s) + 2H2O(l) for which H° = -30.20 kJ and S° =…

A: Given reaction is : Ca(OH)2(aq) + 2 HCl(aq)→CaCl2(s) + 2 H2O(l)  H° = -30.20 kJ   S° = 205.9 J/K…

Q: The chemical reaction that causes aluminum to corrode in air is given by 4Al+3O2→2Al2O3 in which…

A:

Q: In which case will a chemical reaction ALWAYS proceed spontaneously at all temperatures (DH and DS…

A: Feasibility of a reaction depends on the change in Gibbs free energy ∆G.  The value of change in…

Q: By examining the following graphs, predict which element- copper or gold-has the higher absolute…

A: To predict which element Cu or Au has a higher absolute entropy at a temperature of 200 K.

Q: For a given reaction, dH = 32 kJ/mol and dS = 117 J/mol. At approximately what temperature would…

A: The spontaneity of the reaction can be determined by the change in Gibbs free energy. The relation…

Q: Consider the reaction 6CO2(g) + 6H2O(1)–C¢H12O6 + 602(g) for which AH° = 2.801×10° kJ and AS° =…

A: The given reaction is : 6CO2(g)  +  6H2O(l)  →  C6H12O6  +  6O2(g)∆H°=2.801×103kJ and ∆S°=-259.0 J/K…

Q: 3) When 1mol of solid carbon reacts with 1mol of diatomic oxygen to produce 1mol o carbon dioxide,…

A:

Q: A reaction has AH = -112 kJ and ASan = 354 J/K. At what temperature is the change in entropy for the…

A: The given data contains, ∆H°reaction=-112 kJ∆S°reaction=354 J/K

Q: A certain reaction has ∆H ° = +23.7 kJ and ∆S° = +52.4 J>K. Is the reaction spontaneous at 298 K…

A: Entropy is the measure of disorderness or randomness of a system. The standard value of entropy can…

Q: Consider the reactionCa(OH)2(aq) + 2HCl(aq)CaCl2(s) + 2H2O(l)for which H° = -30.20 kJ and S° = 205.9…

A:

Q: 1. From the values of AH and AS, predict which of the following reactions would be spontaneous at…

A: