If you have an enthalpy change of -102.2 kJ mol-1 at a temperature of 200C, determine the change  in entropy assuming that the change is reversible and temperature remains constant.

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: In freezing a mole of liquid water at the freezing point, the enthalpy of fusion is 6.01 KJ/mole.…

A: The given data is as follows: The enthalpy of fusion = 6.01 kJ/mol = 6.01×1000 J=6010 J The entropy…

Q: The variation of the Gibbs free energy of a given substance with temperature is given by G = aT + b…

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Q: Estimate the molar entropy of potassium chloride at 5 .0 K given that its molar heat capacity at…

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Q: The enthalpy of vaporization of chloroform (CHCl3) is 29.4 kJ mol−1 at its normal boiling point of…

A: Given that, Enthalpy of vaporization of chloroform, ∆Hvap(CHCl3) chloroform= 29.4 kJ mol−1 =29400 J…

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

A: The entropy of a substance is the measure of disorder. As the disorder in the substance is…

Q: AS ΔΗ- ΔΗ: ↑

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

Q: For a mixture of three ideal gases, A, B, and C, what is the mole fraction of A when the entropy of…

A: The mole fraction of a gas is a unitless quantity. It is calculated by dividing the number of moles…

Q: Calculate the change in entropy of a system when 2 mol water vapour at 150 ⁰C is cooled down to -10…

A: I have given the answer in the explanation section. Hope you  will understand that.

Q: Calculate the change in molar entropy of the system associated with transforming a supercooled water…

A: Initial state. Water at -10°C. To convert it into ice we will first take the water to 0°C and then…

Q: The standard molar entropy of liquid water at 273.15 K is 65 J K−1 mol−1, and that of ice at the…

A: Given information: Standard molar entropy of water = 65 J/K.mol Standard molar entropy of ice = 43…

Q: The change in the entropy of the surroundings is found by klnW O A G/ T Ο -ΔΗΓ O - AG/ T

A: The change in the entropy of the surroundings is found by

Q: Under standard conditions the absolute entropy of liquid water is (H2O(l)) = 69.91 J K-1 mol-1 .…

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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: 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: 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: what is the name of the symbol of the single thermodynamic quantity (function) which determines…

A: what is the name of the symbol of the single thermodynamic quantity (function) which determines…

Q: The enthalpy of vaporization of methanol is 35.27 kJ mol−1 at its normal boiling point of 64.1 °C.…

A: Enthalpy of vaporization (∆Hvap)  is defined as the minimum amount of energy that must have supplied…

Q: In a spontaneous process, the entropy of the system always increases. True or False

A: The overall spontaneity of the reaction is determined by the Gibbs free energy change, (∆G) If the…

Q: The standard molar enthalpy of fusion for xenon is 2.30 kJ mol–1. Calculate the standard molar…

A: Given, molar enthalpy of fusion for xenon , = 2.30 kJmol Temperature =-112°C=(-112+273)K=161 K

Q: The Third Law of Thermodynamics states that the entropy of a perfect crystal at absolute zero (0 K)…

A: As per the third law of thermodynamics, the entropy of a perfect crystal at absolute zero (0K) is 0.…

Q: Calculate the change in entropy of 1 mol of nitrogen if it is heated from 300 K to 1000 K at a…

A: Moles of nitrogen = 1 mole T1 = 300 K T2 = 1000 K P = 1 atm

Q: An unknown compound has a melting point of 500°C and an enthalpy of fusion of 1.2 kJ/mole. Determine…

A: We have melting point of 500°C, enthalpy of fusion as 1.2 KJ/mole. We have to calculate the change…

Q: The molar heat of combustion, A H2, of methane is -890.7 kJ mol-1. If 0.0500 moles of methane is…

A:

Q: What is the signifi-cance of entropy being a state function?

A: Entropy is a thermodynamic state function that determines randomness in a system.  When we raise…

Q: What is the entropy (S) of a system with 6.4 x 1020 microstates?

A: The relation between entropy and number of microstates is given by Boltzmann's equation - S = KB ln…

Q: One mol of an ideal gas at 300 K expands reversibly from 3 x 102 m³ to 5 x 102 m3, Calculate the…

A: Entropy change at contact temperature with change of volume relation given below

Q: The enthalpy of the graphite → diamond phase transition, which under 100 kbar occurs at 2000 K, is+…

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Q: The enthalpy of vaporization of chloroform (trich loromethane).CHCI3, is 29.4 kJ mol-1 at its normal…

A: a.

Q: Derive an expression showing how entropy can be related to thermodynamic probability.

A: The relation between entropy and thermodynamic probability are given as follows:

Q: Titanium has a normal melting point of 1668 °C and a molar enthalpy of fusion of 14.15 kJ mol-1 .…

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Q: Explain in molecular terms why the entropy of a gas increases (a) with volume, (b) with temperature.

A: (a) The dispersion of energy and matter in the system indicates the entropy. By increasing volume…

Q: The enthalpy for a certain process is 146.4 kJ/mol and the entropy for the process is 463.6 J/K.  At…

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

A: Standard molar enthalpy change can be expressed in terms of standard molar entropy change and…

Q: Suppose that you find out that a system has an absolute entropy zero. What else can you conclude…

A: The absolute entropy of a system is the entropy at absolute temperature, 0 K.

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: If the final temperature is 166.66K, determine the change in entropy for each substance.

A: Entropy (S) parameter in thermodynamic measure the randomness of the system it is a state function

Q: Describe the entropy of water running from a river down to a waterfall.

A: Entropy is the randomness/disarrangement of particles.

Q: Under what circumstances may the properties of the system alone be used to identify the direction of…

A: A reaction which occurs without any intervention in the given set of conditions is termed as…

Q: What would the entropy be for a system with 6.05E+1 microstates, in J/mol-K?

A: The relationship between number of micro-states with entropy is given as follows:

Q: Calculate the change in entropy

A:

Q: Thermodynamic state functions include enthalpy, entropy, and _____________.

A: Thermodynamic state function having four states, but here only two is given remaining has to be…

Q: The enthalpy of vaporization (deltaHvap) of water was experimentally determined to be 151.3 kJ for…

A:

Q: Exothermic Changes: the system by the surroundings the surroundings. The heat the freedom of motion…

A: Exothermic changes The system looses heat to the surrounding.the heat gain by the surrounding…

Q: Calculate a change in entropy for an irreversible process of a system and contrast with the change…

A: An irreversible process is a process that cannot return both the system and the surroundings to…