The molar heat capacity of a certain substance at different phases and temperatures is given below.  ---picture Since deltaH (melting point) = 1254 J / mol for this substance with a melting point of 150 K, what is the entropy of this substance at 300 K?

Q: Chlorofluorocarbons (CFCs) are no longer used as refrigerants because they destroy the ozone…

A: Boiling point, standard enthalpy of vaporization and standard entropy of vaporization are related by…

Q: For each of the following pairs, predict which substance possesses the larger entropy per mole: 1…

A: The question demands which substance has greater entropy: (a) 1 mol of H2O (g) at 100˚C, 1 atm (b) 1…

Q: With two dice, each numbered 1–6, there are two possible ways to roll a 3. and Thus, for the outcome…

A: Answer is explained below.

Q: A certain liquid substance boils at 93.6 °C (at 1 atm) and has a standard enthalpy of vaporization…

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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: Calculate the standard entropy change for the combustion of propane, a common fuel. C3H8(g) + 502(g)…

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Q: Which statement is generally true about the standard molar entropy? It is greater for a a solid than…

A: Entropy, is the measure of randomness of molecules . Since , gas molecules are more random so they…

Q: At high temperatures, ammonia decomposes to N2 and H2:2NH3 (g) ----> N2 (g) + 3H2 (g) ΔH for the…

A: Given information, ΔH for the reaction is positive and ΔS are positive. The given decomposition…

Q: In a particular spontaneous process, the entropy of the system decreases. What can you conclude…

A: Spontaneous process: In thermodynamical terms, a spontaneous process is a process in which…

Q: The molar heats of fusion and vaporization of ethanol are 7.61 and 26.0 kJ/mol, respectively.…

A: Given Data : Molar heats of fusion ethanol ,                  Q 1   = 7.61 kJ /mol Molar heat…

Q: If the normal boiling point of a liquid is 67 °C, and thestandard molar entropy change for the…

A: The boiling point of a given liquid can be defined as the temperature at which the vapor pressure of…

Q: Use the following information to find entropy of the vaporization of Sn (tin). The boiling point…

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Q: 5) Find the molar entropy of vaporization (in J/(K-mol)) for a certain substance given that to…

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Q: Isomers are molecules that have the same chemical formula but different arrangements of atoms, as…

A: C5H12 has three possible skeletal isomers: n-pentane iso-pentane neo-pentane Their structures are:…

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 the entropy change when 3.00 mol benzene vaporizes reversibly at its normal boiling point…

A: Entropy- Entropy is a thermodynamic property. Entropy determines spontaneity of process.…

Q: Arrange the following sets of systems in order of increasing entropy. Assume one mole of each…

A: Entropy It is the measure of randomness or disorder of a system. Gaseous system is having high…

Q: Determine the standard entropy of N2(g) given the following information: N2(g) + 3H2(g) --> 2 NH3(g)…

A: Entropy is the property of the system which measures the degree of disorder or randomness in the…

Q: In a particular spontaneous process, the number of microstates available to the system decreases.…

A: The statement given is "In a particular spontaneous process, the number of microstates available to…

Q: If the absolute entropy for O2 (g) is 126 J/(mole∙K), what is the ΔS for the complete combustion of…

A: C2H4 (g) on complete combustion gives CO2(g) and H2O(g)  We need a balanced equation for the…

Q: Calculate the standard molar entropy change for the combustion of methane gas using S° values from…

A: The equation for combustion of methane gas is, The standard entropy value for oxygen O2 is…

Q: A certain liquid substance boils at 84.7 °C (at 1 atm) and has a standard enthalpy of vaporization…

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Q: 4. For each pair of substances, circle the one with the higher standard molar entropy (S°) at 25 °C.…

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Q: 9. For any substance, the only case entropy has a zero value, when *

A: The third law of thermodynamics :  The law states that the entropy of a purely and perfectly crystal…

Q: What is the entropy when 1.20 moles of CCLF2 vaporize at 25°C? [AH(vap) = 17.2 kJ/mol at 25°C]

A: Entropy change at constant temperature is given by  where ΔS = entropy change  Q = heat transferred…

Q: An explosion brings down an old building, leaving behind a pile of rubble. Does this cause a…

A: Given information,      An explosion brings down an old building, leaving behind a pile of rubble.

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: Stephanie has 17.7 g of liquid carbon dioxide CO2 which vaporizes at its normal boiling point -78.46…

A: mass of CO2 = 17.7 g normal boiling point -78.46 °C   Molar mass of CO2 = 44.01 g/mol  Enthalpy of…

Q: Isomers are molecules that have the same chemical formulabut different arrangements of atoms, as…

A: a.

Q: A certain liquid substance boils at 53.3 °C (at 1 atm) and has a standard enthalpy of vaporization…

A: The boiling point of the given substance is = 53.3oC = 53.3oC+273.15 = 326.45 K The standard…

Q: Which of the following has the greatest molar entropy? All have the same O F2 () O F2 (s) O F2 (s)

A: Entropy: Entropy can be defined as the measurement of randomness or disorderness in the…

Q: Chlorofluorocarbons (CFCs) are no longer used as refrigerants because they catalyze the…

A: Condensation is the exact opposite of vaporization. The amount of heat liberated when one mole of…

Q: Describe the spontaneity and solve entropy of the processes. Sublimation of naphthalene balls as…

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Q: Calculate the entropy, S, when a. W = 18.6 b. W = 50.63 c. W = 14.7 d. W = 2.90

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Q: What are the entropy changes for 1.00 mol of water undergoing reversible  vaporization and fusion at…

A: Given-> Moles = 1 mole ∆Hvap = 40.656 KJ/mole ∆Hfus = 6.009 KJ/mole Boiling point (Tb) = 100°C =…

Q: Which of the following descriptions about entropy is/are TRUE? I. It is positive for an isolated…

A: A question based on chemical thermodynamics that is to be accomplished.

Q: Consider the following reaction at constant P. determine the value of deltaS of the surroundings at…

A: In this question, we want to determine the ∆Ssurr  You can see the details solution below.

Q: With two dice, each numbered 1–6, there are two possible ways to roll a 3. and Thus, for the outcome…

A: Solution Entropy is a state function that is often mistakenly referred to as the ‘state of…

Q: What is the molar entropy for the series of compound? a) 36.0 g H2O (l) b) 17.0 g NH3 (g) c) 60.0…

A: When one substance reacts with another to produce one or more products, this is called a chemical…

Q: Which of the following is incorrect about entropy of a substance? O Slig > 0 Sgas = 0 O Sliquid >…

A: Entropy: It is the measure of disorder/randomness of a system. Order of entropy: Gas> liquid >…

Q: 4. For a certain process at 300.0 K, AG = -77.0 kJ/mol and AH = -56.9 kJ/mol. Find the entropy…

A: The Gibbs-Helmholtz equation gives the relation between the free energy change, enthalpy change, and…

Q: The following entropy values are for carbon tetrachloride (liquid and vapor):       For CCl4(l), So…

A: Given  Boiling point   = 76.72 ℃                         = (76.72 + 273)                        =…

Q: The third law of thermodynamics states that O AU = q + w energy is not created nor destroyed for any…

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Q: The total entropy change will determine whether a process is spontaneous (favours the forward…

A: Entropy :- It is thermodynamic quantity which refers to randomness or disorderness of system and…

Q: Please consider 0.15 gm of Constantan (a Cu/Ni alloy widely used in thermocouples, c = 390 J/•K-kg)…

A: 0.15 g of Constantan was cooled through exposure to the lab atmosphere.

Q: Calculate the entropy of the phase change of uranium hexafluoride from gas to solid. UF6(g) → UF6(s)…

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Q: Compare what will happen to the entropy of the whole system in the following two scenarios: A) if…

A: Oil is a substance made up of long hydrocarbon chain. That's why it is not soluble in water or do…