Write T if true, and F if false 1. It is more convenient to use change in enthalpy, ΔH, as a criterion of spontaneity than change in entropy, ΔS

Q: Explain how the internal energy and entropy of a system composed of two levels vary with…

A: SOLUTION: Step 1: Consider a two-state system in which the lower state is assigned an energy equal…

Q: Are heat capacities (Cv) independent or dependent on temperature? Explain

A: Heat capacity is defined as the minimum amount of heat which is required to raise the temperature of…

Q: 12 The molar heat of combustion, A H;, of sucrose is -5643.4 kJ mol 1, If 0.250 moles of sucrose is…

A: Given :  12.  ∆Hc° of sucrose = -5643.4 KJ mol-1  Moles of sucrose = 0.250 moles  Temperature = 16°C…

Q: The heat of vaporization AH, of heptane (C,H,6) is 31.2 kJ/mol. Calculate the change in entropy AS…

A: The change in entropy (in kJ/K) can be calculated from the heat of vaporization ∆Hv by the following…

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: HNO2(aq) + OH (aq) H20(1) + NO2 (aq) K= 4.5×1010 What is the standard change in Gibbs free energy at…

A: Given :- K = 4.5 × 1010                T = 25 °C                 R = 8.314 J/K.mol  To calculate :-…

Q: Given the chemical reaction:  2 NO2 (g) → N2O4 (g) where ΔH∘∘ = −57.2 kJ/mol and ΔS∘∘ = −176…

A:

Q: starting from the definition of Gibbs Free Energy, the 1st law of thermodynamics, the 2nd law of…

A: To derive the criteria for spontaneity for Gibbs free energy.

Q: For water, ΔHfusion = 6.02 kJ/mol and ΔHvap = 40.65 kJ/mol.   If 0.250 moles of water vaporizes at…

A: ∆Ssurrounding   = - ∆Ssystem. ∆Ssurrounding    = - ∆Hvaporization / Tboiling.

Q: PE6.2 Calculate the standard molar Gibbs free energy change (AGran) at 298 K and at 400 K for the…

A: Standard molar Gibbs free energy change, is the change in free energy which occurs when one mole of…

Q: What is the change in entropy when 0.125 mol of potassium freezes at 67.2°C (Hfus = 2.39 kJ/mol)?

A: Freezing point, standard enthalpy of fusion and standard entropy can be related by the equation…

Q: The vaporisation of a certain element at 23.0 oC has the following enthalpy and entropy values:…

A:

Q: It refers to how a circumstance can occur without the help of any external factors? a. Enthalpy O b.…

A:

Q: Suppose that when you exercise, you consume 100 g of ghucose and that all the energy rekased as heat…

A: Enthalpy of combustion of glucose = -2805 KJ/molMolecular mass of glucose = 180g/molGiven mass =…

Q: The heat of vaporization AH, of toluene (C,H,CH,) is 38.1 kJ/mol. Calculate the change in entropy AS…

A: Solution- ∆Hv=38.1kJmol×1000J1kJ=38100JmolMass of toluene =32 gboiling point of Toluene =110.6oC +…

Q: What is the total change in entropy of the universe (system + surroundings) if 4.4 g of CO(g) reacts…

A:

Q: For the decomposition of mercury(II) oxide, HgO, to mercury and oxygen: 2HgO(s) → 2Hg(l) + O2(g)…

A: Standard entropy change is the difference of standard entropy of product from standard entropy of…

Q: The heat capacity at 1 atm. pressure of solid magnesium in the temperature range from 0°C to 560 °C,…

A: Since the units of T to be substituted in the Cp equation is not mentioned. Hence i'm assuming it to…

Q: What is the significance of the change in Gibbs free energy (ΔG) for a reaction?

A: In thermodynamics free energy or Gibbs free energy is the energy that is used to express the total…

Q: Assuming ideal gases reactants and products. Estimate the enthalpy of reaction hR for the combustion…

A: The enthalpy of vaporization of water is defined as the amount of heat energy required to vaporize a…

Q: Recall that for a monoatomic ideal gas, CV = (3/2)R. If an equal number of moles of any three ideal…

A: The ideal gas equation is given by  PV = nRT

Q: Calculate the entropy change (in J/K) when argon at 25oC and 1.0 bar in a container of volume of…

A:

Q: The normal boiling point of ethanol, C2H5OH, is 78.3 °C,and its molar enthalpy of vaporization is…

A: Record the given data, The given boiling point Tb = 78.3oC = 351.45 K ΔH = 38.56 kJ/mol = 38560…

Q: If there are two chemical reactions: #1 with change in Gibbs free energy of -25 kJ/mol; and #2 with…

A: #2 since it has a higher change in Gibbs free energy.

Q: Given one mole of each, which of the following has the highest number of accessible microstates?…

A: As the entropy increases, the microstates also increase.

Q: Recall that for a monoatomic ideal gas, CV = (3/2)R. If an equal number of moles of any three ideal…

A:

Q: P3C.6 Use values of enthalpies of formation, standard entropies, and standard heat capacities…

A:

Q: The heat of vaporization AH, of acetonitrile (CH, CN) is 29.8 kJ/mol. Calculate the change in…

A: Given data: Heat of vaporization of CH3CN = 29.8 kJ/mol Mass of CH3CN = 35 g Molar mass of CH3CN =…

Q: The normal boiling point of ethanol, C2H5OH, is 78.3 °C, and its molar enthalpy of vaporization is…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: Calculate the change in entropy (J/mol·K) for the surroundings for a reaction where ΔH° = 126.9…

A:

Q: What is the significance of the change in Gibbs free energy (∆G)for a reaction?

A: The significance of the change in Gibbs free energy (∆G)for a reaction: (i) If ∆G for a reaction…

Q: What is the chemical significance of a positive Gibbs free energy change and what is the chemical…

A: The amount of energy available for doing some useful work is termed as free energy or Gibbs free…

Q: How does the entropy of ice at −5°C diff er, if at all, from its entropy at −50°C?

A: Entropy- Entropy is a thermodynamic property. Entropy determines tendency of process. Tendency means…

Q: The Gibbs Free Energy Equation: AG change in free energy ΔΗ change in enthalpy TAS (temperature)…

A: Gibbs's free energy measures the spontaneity of the process. The Gibbs free change for a given…

Q: 4) Consider the isothermal expansion of a 1.00 mol sample of ideal gas at 37 from the initial…

A: Dear student ,   since you have posted multiple parts questions we are allowed to solve only first…

Q: Q.6 The standard enthalpy of combustion of solid urea (CO(NH2)2) is -632 kJ mol at 298 K and its…

A:

Q: What is the entropy change

A:

Q: Calculate the entropy change of the surroundings in J K-1.

A: The entropy change of the surrounding is needed to be calculated.

Q: 1. The heat capacity at 1 atm. pressure of solid magnesium in the temperature range from 0 °C to 560…

A: Since you have posted multiple questions. we are entitled to answer the first only.

Q: Calculate the measurable change in entropy (for the system) when the state of 2.00 mol of diatomic…

A: Change in entropy of system : VfVi = Tf × PiTi × Pf = 408 × 1.50298 × 7.00 = 0.2934  Cv = Cp - R =…

Q: In the reactions: 2SO­3(g) → 2SO2(g) + O2(g) and CaO­(s) + CO2(g) → CaCO3(g), the entropy of the…

A: Balanced Reaction 2SO­3(g) → 2SO2(g) + O2(g)  Number of gas molecules reacts is 2 Number of gas…

Q: Recall that for a monoatornic ideal gas, CV = (3/2) *R . If an equal number of moles of any three…

A: For monoatomic ideal gas  CV = (3/2)R  Change in entropy is given as follows  ∆S = -R [n1lnx1 +…

Q: Does the entropy of the system increase, decrease, or stay the same when the volume of a gas…

A: Entropy is the thermal energy of a system per unit of temperature. This energy is not available for…

Q: The heat of vaporization AH, of acetonitrile (CH,CN) is 29.8 kJ/mol. Calculate the change in entropy…

A:

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

A:

Q: Consider a process in which an ideal gas changes from state 1 to state 2 in such a way that its…

A: No, this is not an isothermal process. Temperature of initial state ( state 1 ) and final state (…