What is the entropy change of a system in J/K for the melting of one mole of aluminum at its normal melting point of 660°C? The value of AHfusion of aluminum at this temperature is 10660 J/mol. (А) -16.2 J/К в) -11.4J/К c) +11.4 J/K D +16.2 J/K None of these

Q: For the reaction HCl(g) + NH3(g) → NH4Cl(s) AG° = -103 kJ and AS° = − 284.8 J/K at 255 K and 1 atm.…

A: we have to determine the enthalpy change for the reaction

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: Calculate the temperature (K) at which a reaction becomes spontaneous when ΔS = 769.8 J/mol-K and ΔH…

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Q: For a particular chemical reaction DH = 6.8 kJ and DS = –29 J/K. Under what temperature condition is…

A: Gibbs Helmholtz Equation: Is the equation denoted by,…

Q: DeltaU°rxn

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Q: At 0∘C, ice and water are in equilibrium and ΔH = 6.00 KJ mol for the process H2O(S) → H2O(L). What…

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Q: Using enthalpies of formation, calculate AH° for the following reaction at 25°C. Also calculate AS…

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Q: The evaporation enthalpy of benzene C6H6 is 394.0 J / g at the normal boiling point which is 80.10…

A: Given : Enthalpy of vaporisation of benzene = 394.0 J/g Boiling point temperature = 80.10 oC And…

Q: The balanced chemical equation for the combustion of propane gas is: C3H8 (g) + 5 O2 (g) --> 3 CO2…

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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: What is Δ G° at 25 °C?   N 2O 4(g) → 2 NO 2(g) Δ H° = 58.03 kJ Δ S° = 176.7 J/K

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Q: One mole of liquid isopropanol at 10oC is heated to isopropanol vapor at 300oC at constant pressure.…

A: According to Hess law, the amount of heat released or absorbed during the reaction remain same…

Q: Calcium oxide (CaO), also called quicklime is prepared by decomposing limestone (CaCO3) in a kiln at…

A: We can calculate Gibbs free energy by using formula ∆G= ∆H - T×∆S Where  ∆G = Gibbs free energy…

Q: The addition of 121  g potassium fluoride to 591  mL of water (d = 1.00 g/mL) causes the temperature…

A: The mass of solution is calculated as shown,

Q: Is the following reaction spontaneous at room temperature (25.0 °C) ? 2 H2S(g) + 3 O2(g) 2 SO2(g) +…

A: Interpretation: The given reaction is spontaneous at room temperature or not is to be determined. At…

Q: Using enthalpies of formation (See the Supplemental Data), calculate ΔH° (in kJ) for the following…

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Q: For a particular reaction, AH == 81.95 kJ and AS = 27.0 J/K. Calculate AG for this reaction at 298…

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Q: Is ΔH positive or negative when 1 mol of water vapor con-denses to liquid water? Why? How does…

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Q: Using enthalpies of formation (See the Supplemental Data), calculate ΔH° (in kJ) for the following…

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Q: Calculate the entropy change (in J/K) that occurs when 31.7 g of ice melts at its normal melting…

A: we have to calculate the entropy change

Q: What is the total entropy change when 1.50 mol of water (ΔHfus = 6.01 kJ/mol) freezes at 0.0 °C in a…

A: To calculate the total entropy change when water freezes, we need to consider the entropy change…

Q: Calculate the standard change in Gibbs free energy, Δ?∘rxn , for the given reaction at 25.0 ∘C .…

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Q: Determine the equilibrium constant (K) for the following reaction at 298 K. You must show your work…

A: To calculate the equilibrium constant first of all we calculate the change in Gibbs free energy.…

Q: Use the Standard Thermodynamic Properties table to calculate ΔHo for the following reaction:…

A: Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and…

Q: From the standard molar enthalpy of combustion of pentane at 298 K, calculate the value of  Δr A°…

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Q: which reaction of carbon monoxide w metal oxide would produce pure metal and carbon dioxide…

A: The reactions given are, 1) Fe2O3(s)  →  2 Fe(s)  +  3/2 O2(g)          ΔrGº = +742.2 KJ/mol  2)…

Q: A physical change is spontaneous at 361 K and has the following free energy and entropy changes:…

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Q: In a typical cold pack (used for sports injuries), a salt such as ammonium nitrate is kept in a…

A: Dissolution of ammonium nitrate in water is given by, NH4NO3(s)→H2O(l) NH4+(aq)+NO3-(aq)   ∆H=+25.09…

Q: A particular reaction has a ΔHo value of -169 kJ and ΔGo of -156 kJ at 524 K. Calculate ΔSo at 524 K…

A: The relation between ΔHo, ΔGo and ΔSo is shown below. ∆G∘=∆H∘-T∆S∘

Q: The balanced chemical equation for the combustion of propane gas is: C3H8 (g) + 5 O2 (g) --> 3 CO2…

A: Given reaction: C3H8 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (g) ∆G°RXN = -2385 kJ Temperature = 17.0 °C…

Q: Use the data from this table of thermodynamic properties to calculate the values of ASxn for each…

A: 4 NH3(g) + 7 O2 (g) → 4 NO2(g)  + 6 H2O(g)S°(NH3, g) = 192.5 J/mol KS°(O2, g) = 205.14 J/mol…

Q: For the decomposition of silver oxide, at 298 K and 1 atm, according to the chemical equation:…

A: We have to calculate the ∆G and temperature

Q: ion 3: (a) What is the second law of thermodynamics? For any process, there are four possible sign…

A: Given,                             Enthalpy of Vaporization = 58.51 KJ / mol…

Q: Atte Calculate the standard change in Gibbs free energy for the reaction at 25 °C. Standard Gibbs…

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Q: Calculate the temperature (in oC) above which the following standard reaction is spontaneous.…

A: The relationship between Gibbs energy chane (∆G°) , entropy change (∆S°) and enthalpy change (∆H°)…

Q: Calculate the standard enthalpy change for the following reaction at 25 °C. MgCl, (s) + H,O(1)…

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Q: HI has a normal boiling point of -35.7 and its ΔvapH is 21.16 KJ/mol. Calculate the molar entropy…

A: Chemical thermodynamics is branch of chemistry in which we deal with amount of heat evolved or…

Q: What is the entropy change of the system in J/K for the reversible cooling of one mole of copper…

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Q: Given ΔHrxn = -98.9 kJ and ΔSrxn = - 94.0 J/K at 25 oC for the combination reaction of sulfur…

A: Answer:- This question is answered by using the simple concept of calculation of Standard Gibbs free…

Q: Calculate the standard enthalpy change for the reaction at 25 °C. Standard enthalpy of formation…

A: Given, Mg(OH)2(s) + 2HCl(g) ➝ MgCl2(s) + 2H2O(g) Temperature (T) = 25°C Species   standard enthalpy…

Q: Consider the following reaction, with the table of values provided. Calculate the ΔSº of the…

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Q: Given the following equation, H2O(g) + CO(g) → H2(g) + CO2(g)             ΔG°rxn = -28.6 kJ…

A: The reaction given is 1) H2O(g) + CO(g) → H2(g) + CO2(g)                                 ΔG°rxn =…

Q: The normal boiling point of a substance is 433 °C. Calculate the pressure at which this substance…

A: this solution is done using the clausius-clapeyron equation .

Q: Consider the vaporization of 1 mol of a liquid,  A(l) ⟶⟶A(g)  at 298 K and 1.00 atm.  If 39.5 KJ…

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Q: Calculate the standard enthalpy change for the reaction at 25 °C. Standard enthalpy of formation…

A: The standard conditions are:  Product ∆Hf KJ/mol Mg(OH)2 s   -924.7 HCl(g) -92.5 Mg(Cl)2 s…

Q: Ice is heated at a constant pressure until it melts and vaporizes. What signs are associated with…

A: Ice is heated at a constant pressure until it melts and vaporizes.What signs are associated with the…

Q: Consider the following reaction at 25 °C: 3 NiO(s) + 2 NH (g) → 3 Ni(s) + N,(g) + 3 H̟O(g) kJ If AG°…

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Q: Calculate ΔrH° for the combustion of methane gas, CH4 : CH4(g)  +   2 O2(g)  →   CO2(g)  +  2…

A: The standard enthalpy change for the formation of one mole of a compound from its elements in their…

Q: Calculate the temperature, in Kelvins, at which the decomposition of calcium carbonate becomes…

A: Given:The reaction is

Q: Which statement is INCORRECT with respect to thermodynamics? A) The sign of ΔG for a reaction is…

A: A) Gibbs free energy change, ∆G is related with enthalpy change, ∆H, temperature and Entropy change,…