Dissolution of ionic compounds generally involves an increase in entropy (+ΔS°), but for a few specific metal ions, dissolution of the ionic compound can lead to a decrease in entropy. For example, the dissolution of magnesium chloride (MgCl2) has a ΔS° = -115 J K-1 mol-1.  Explain this decrease in entropy

Q: Consider this reaction at 298 K: CO2 (g) + H2 (g) ⇌ CO (g) + H2O (g) Calculate ΔGrxn under the…

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Q: In a reaction, 1.00 mole of H2 is produced at a constant pressure of 1.00 atm and at 298 K (1 L atm…

A: Therefore, ΔE in this reaction is +483.6 kJ.Explanation:The equation for calculating ΔE is:ΔE = ΔH -…

Q: "he heat of vaporization of carbon disulfide, CS2, at 25°C is 27.2 kJ/mol. What is the entropy…

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Q: You add some of the white crystals to a small test tube filled with water. The water in the test…

A: Given : Initial temperature = 250C = 298 K Final temperature = 150C = 288K

Q: Toluene has a normal boiling point of 101.4 ℃ and its ΔHvap is 33.8 kJ/mol. Calculate the molar…

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Q: What is ΔS for the boiling of C2H5OH? Use the data given below. Assume that enthalpy and entropy…

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Q: As O2(l) is cooled at 1 atm, it freezes at 54.5 K to form solid I. At a lower temperature, solid I…

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Q: For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all…

A: When free energies (useful work) are estimated under standard conditions (1 atm pressure and 273.15…

Q: CaCO3(s) → CaO(s)+CO2(g)CaCO3(s) → CaO(s)+CO2(g)      Calculate the value of the equilibrium…

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Q: at what temperature will this reaction be exactly at equilibrium?

A: Enthalpy change (∆Ho)=-162.2 kJ =-162.2  X 103J Entropy change (∆So)=104.2 J/K ∆Go=0 at equilibrium…

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Q: A process increases the entropy of the system by 128 J/mol K and absorbs 54 kJ/mol of heat from the…

A: Given: Change in entropy (∆S) = 128 J/mol•K Absorbed heat=54 kJ/mol =54×103 J/mol    To determine…

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: the reaction is negative at all temperatures. as zero entropy since elements should have zero…

A: Entropy is degree of randomness or disorderness. As we know,  order of Entropy is Solid <…

Q: Zn(s) + 2HC1(aq) → ZnCl2 (aq) + H2 (g) + 153kJ For this reaction at 25°C, • Change in enthalpy: […

A: The reaction given is,

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

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Q: A metal alloy melts with an enthalpy change of 75 kJ/mol and an entropy change of 133.0 J/K.mol.…

A: For the melting of alloy, Enthalpy change (∆H) = 75 kJ/mol…

Q: Determine ΔH, q, w, and ΔE at 298 K and 1 atm pressure for the reaction of 9.348 g of NH3(g) with…

A: Enthalpies of formation of NH3(g), HCl(g), and NH4Cl(s), which are -46.11 kJ/mol, -92.31 kJ/mol, and…

Q: When heated, CaCO, decomposes into CaO and CO₂ according to the following equation: CaCO,(s)=CaO(s)+…

A: Given,CaCO3 (aq) + CO2 (g)

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: Suppose a compound could point in any of three directions in the solid and still have the same…

A: • This problem is based upon the third law of thermodynamics.  • This law can be given as, Total…

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: In freezing a mole of liquid water at the freezing point; the enthalpy of fusion is 6.0lkJ/mol…

A: The enthalpy of fusion is 6.01 KJ/mol To determine : entropy of system , surrounding and universe

Q: a) Carry out the following transformation and provide mechanism. C,H; CH: H a) H.C. C NH2 -COOH Ph…

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Q: Discuss the spontaneity of each process in the following scenarios, based on the use of the Gibbs…

A: The spontaniety of Reaction depends upon the sign of ∆G value for the reaction . The reaction is…

Q: The enthalpy change for a reaction can be calculated using the formation enthalpies of the products…

A: Each chemical reaction is associated with the donation or acceptance of a certain amount of energy.…

Q: During a certain reversible process, the surroundings undergo an entropy change, ∆Ssurr = -78…

A: As per the thermodynamic concept, the entropy of universe is the sum of entropy of system and…

Q: Calculate the change in standard free energy for a reaction at 316.30 K; the change in standard…

A: The provided temperature (T)=316.30K change in standard molar enthalpy(∆H)= -95.40kJ/mol change in…

Q: Calculate the value of the free energy change, ΔG, for the reaction below at 250.0ºC when the…

A: using the value given NH3 , N2, H2 all value is given atm so using this calculate the Kp. apply the…

Q: Calculate the value of the free energy change, ΔG, for the reaction below at 100.0ºC when the…

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Q: When heated above 840°C, calcium carbonate decomposes, releasing carbon dioxide gas and leaving…

A: ∆G° of a process can be calculated from ∆H° , ∆S° and temperature by using the formula ∆G° = ∆H° -…

Q: Calculate the value of the free energy change, ΔG, for the reaction below at 600.0ºC when the…

A: Given reaction is :  2 POCl3 (g) → 2 PCl3 (g) +  O2 (g)  Pressures of POCl3 (g) at 600.0ºC = 20.00…

Q: The standard free energy of the hydrolysis of ATP to ADP: ATP (aq) → ADP (aq) + (aq) phosphate in…

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Q: What is the change of entropy in the vaporization of 5 grams of ice cube at 0C to steam at 100 C.…

A: The degree of randomness of the system is called entropy. Specific heat capacity of water(c)=…

Q: Which of the following processes results in the largest decrease in Entropy? The heat of fusion of…

A: Entropy an be defined as the thermal energy per unit temperature that is unavailable for doing a…

Q: Substance C₂Hg(g) O₂(g) CO₂(g) H₂O(g) he thermodynamic data calculated above for this reaction…

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Q: Ammonia can be produced by the reaction of hydrogen gas and nitrogen gas, as shown below: N₂(g) +…

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Q: Acctone, OCH, Is a fragrant liquid solvent for lacquers, paint removers, and nail polish remover. It…

A: Welcome to bartleby ! We have to calculate standard free energy of formation of acetone

Q: A chemical reaction has occurs at 308 K and has the following enthalpy and entropy changes: ΔHrxn =…

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Q: What is the standard reaction entropy, ΔS°rxn (in J/K), for the reaction given below?   P4(s)   +…

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Q: A closed vessel of volume 2.1 L contains a mixture of neon and fluorine gas. The total pressure of…

A: Given,  Volume of the closed vessel = 2.1 L  Total pressure = 3.8 atm at 0°C  The mixture is heated…

Q: Dissolution of ionic compounds generally involves an increase in entropy (+ΔS°), but for a few…

A: entropy is measurement of randomness.As the randomness increase entropy also increase. In…

Q: Which statement DOES NOT describe the entropy of a system in its molecular state?  Entropy changes…

A: The degree of randomness in a system is measured in terms of entropy. The higher the entropy greater…