0.50 moles of an ideal gas is placed in a solid contained of fixed volume and cooled slowly (and reversibly!) from a temperature of 400 K to 250 K. What is the change in entropy (in J/K) for this process? Assume that Cv=3/2 R for the gas.

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Q: The entropy change ΔS for a phase transition equals ΔH/T, where ΔH is the enthalpy change. Why is it…

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

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Q: Consider a process in which 250 kJ of energy is transferred reversibly and isothermally as heat to a…

A: Entropy is the measure of degree of randomness. The change in entropy can be measured as follows:

Q: 1. a) Why is chemical potential analogous to temperature and pressure? b) Under what circumstance…

A: a). The energy that can be released or absorbed due to the change of number of particles of the…

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: Consider the reaction CO(g) + Cl2(g)COCl2(g) Using standard thermodynamic data at 298K, calculate…

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

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Q: Given the following values for the changes in enthalpy (∆H) and entropy (∆S), which of the following…

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Q: We have a parcel of dry air. This parcel is lifted isothermally, and the pressure changes from 998…

A: Entropy: It is defined as the measure of the system's thermal energy per unit temperature that is…

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Q: AS ΔΗ- ΔΗ: ↑

A: Entropy is the term defined as irregularities of the atoms if the irregularities increase then the…

Q: A system contains 859 particles and has 4.43 x 1025 possible configurations. What is the entropy of…

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Q: A system is at an initial entropy of 375 J/K and undergoes a system change that results in a final…

A: Given that, Initial entropy = 375 J/K Final entropy = 840 J/K

Q: In the first stage of the industrial production of nitric acid, ammonia reacts at high temperature…

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Q: When 10 J of energy is transferred reversibly and isothermally. Calculate the change in entropy at…

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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: The molar heat capacities for carbon dioxide at 298.0 K are shown below. C 28.95 J K-¹ mol-1 C₂ =…

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Q: What is the change in entropy (positive, negative, or zero) for the system? H2O (l) --> H2O (s)

A: Entropy is the measure of randomness of the system.

Q: How can you calculate the standard entropy change for a reaction from tables of standard entropies?

A: The standard entropy change for a reaction from tables of standard entropies can be calculated by…

Q: Calculate entropy change for 1 mol of nitrogen gaswhen it is heated from 0 Celsuis to 100 Celsius…

A: Unit of temperature is converted as follows,

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: 1A. The following 3 parts pertain to the entropy change for a sample of neon gas initially at 250 K…

A: 1B.Steps required to calculate the Entropy change: 1. First we have to put the entropy change…

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: Determine the entropy change for the combustion of gaseous propane, C3H8, under standard state…

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

Q: A reaction has ΔH∘rxn= -139 kJ and ΔS∘rxn=303 J/K .     Part A At what temperature is the change in…

A: GIven: ΔH∘rxn= -139 kJ=-13900 J ΔS∘rxn=303 J/K . Now, ∆Ssurrounding = ∆Hreaction / T

Q: Consider the reaction 2NaOH(aq) + H2(g)2Na(s) + 2H2O(l) for which H° = 368.6 kJ and S° = 15.30 J/K…

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Q: A mole of N2 is allowed to expand from 0.5L to 10L at constant Temerature . calcuate its Entropy ?

A: The simplest practical reversible method to be used to compute the entropy is isothermal pathway if…

Q: Indicate whether each statement is true or false. The entropy change of the system is equal and…

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

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

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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: Consider the reaction: NO(9) _H2(g) → N2(g) +. H2O) for which AS'= -551.7 J/K at 25°C. Using the…

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Q: How many microstates are present in a system with an entropy of zero?

A: The entropy (S) and microstates(W) are related by formula : S = kB ln(W)  Here , kB = Boltzmann…

Q: Indicate whether each statement is true or false. The entropy change for an isothermal process…

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

Q: Calculate the molar heat capacity (Cpm ) of Magnesium chloride if the change in entropy is 0.264 J/K…

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Q: 2.1. For the isothermal expansion of a gas into a vacuum, (a) Is this a spontaneous process? (b)…

A: a. During this constant temperature or isothermal, expansion into a vacuum, the gas does no work (w…

Q: Calculate the change in entropy that occurs in the system when 47.2 g of isopropyl alcohol (C3H8O)…

A: Formula : ∆Sfreezing =∆HfreezingFreezing point temperature =-5.37×103 J(-89.5 +273.15)…

Q: A typical resting person heats the surroundings at a rate of about 100 W. Estimate the entropy you…

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Q: 4. The entropy change for the process H2O(s) → H2O(1) is 22.1 J/K and requires that that…

A: Given:  ∆Ssystem = 22.1 J/K  qsystem = -qsurrounding = 6.0 KJ = 6000 J  Temperature (T) = 10°C = 283…

Q: Determine the signs of the changes in entropy, AS , and enthalpy, AH , for the physical changes.…

A: A system that is completely isolated from the surroundings and cannot exchange heat and mass with…

Q: 5. When 2.00 mol of an ideal gas at 330K and 3.50 atm are compressed isothermally to some pressure…

A: Given, No. of moles = 2 Temperature = 330 K Initial pressure = 3.50 atm Entropy = -25.0 J/K…

Q: The ethyl alcohol vaporizes at 78 degrees Celcius, what is the change in entropy if 0.25 kg…

A: Solution - According to the question - Given - Change in entropy = ? S = ? H / T ? H = Heat change…

Q: In a certain spontaneous process, the system undergoes an entropy change of 4.2 J>K; therefore,…

A: For a spontaneous process, the entropy of a system is less than the entropy of surroundings.

Q: Considering perfect gases, which state function is zero when two substances are mixed?…

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Q: To reach thermodynamic equilibrium under certain constraints, some state functions need to be…

A: Thermodynamic  - what is the branch of science which deals with the study of relation between  heat…