Calculate the change in entropy of 100 g of ice at 0°C as it is melted, heated to 100°C, and then vaporized at that temperature. Suppose that the changes are brought about by a heater that supplies energy at a constant rate. Sketch a graph showing: (a) the change in temperature of the system, (b) the enthalpy of the system (c) the entropy of the system as a function of time.

Q: Calculate the standard reaction entropy at 298 K when 1 mol NH3(g) is formed from its elements in…

A: Given: Temperature(T)= 298 K When 1 mol of NH3 is formed from its elements in their reference…

Q: 9. A chemical reaction under standard state has the enthalpy of reaction: A,H° = +117 kJ and the…

A: B) The reaction is entropy driven.

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: Describe how entropy and enthalpy combine for the overall determination of spontaneity. What values…

A: The Gibbs equation, shown in equation (1) where ΔH is the enthalpy change, ΔS is the entropy change,…

Q: Indicate whether each statement is true or false. (a) The third law of thermodynamics says that the…

A: The entropy tells the randomness present in the system due to its disorderness created in the…

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 least to greatest in terms of standard entropy (1

A:

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: Calculate the standard state entropy of formation for H2O gas and of H2O liquid. Why is the entropy…

A: Solution: Standard entropy values at 25 deg. C for reference

Q: Calculate the change in entropy when one mole of metallic aluminum is heated at one bar pressure…

A: Enthalpy of fusion for 1 mole of Al is 10699.45 J/molInitial temperature = 25 degC = 298.15K KFinal…

Q: How can a system or chemical reaction have a negative entropy change and be spontaneous?

A: Chemical reaction:

Q: Calculate the change in entropy when one mole of metallic aluminum is heated at one bar pressure…

A: Enthalpy of fusion for 1 mole of Al is 10699.45 J/molInitial temperature = 25 degC = 298.15K KFinal…

Q: Does the entropy of the system increase, decrease, or staythe same when (a) the temperature of the…

A: The maximum possible arrangements of a molecules or the randomness is called the entropy of the…

Q: Identify the equation of Gibbs free energy, AG to predict the spontaneity of a reaction.

A: ANSWER

Q: As a system goes from state A to state B, its entropy decreases. What can you say about the number…

A: Given: Here there is a decrease when the system goes from state A to state B. The objective is to…

Q: What is the change in entropy when one mole of calcite (CaCO3) decomposes at 298.2 K to CaO(s) and…

A:

Q: Why does the entropy of a gas increase when it expands into a vacuum?

A: Entropy of a system is the measure of the randomness or dis-ordered ness of the system. The entropy…

Q: Create a system that shows the third law of thermodynamics and how it relates to the concept of…

A:

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: What thermodynamic quantity is used to determine whether a chemical reaction will proceed…

A: In the thermodynamic system we can determine which reaction is spontaneously or which reaction is…

Q: Calculate the standard reaction entropy at 298 K when 1 mol N2O(g) is formed from its elements in…

A: The involved chemical equation would be: N2 (g) + ½ O2 (g) → N2O (g)

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: calculate the free energy change (in kJ) of a reaction at 466.4K that has an entropy change of…

A: Given,    ΔS = 692.2 J/K   = 0.6922 kJ/K   ΔH = - 4.24 kJ    T = 466.4 K Free energy change ( ΔG )…

Q: What is the application of standard Gibbs free-energy to processes and reactions What is its…

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

Q: If an ideal gas at 1.75 atm and 25 degrees Celsius is isothermally compressed from 800 mL to 150 mL,…

A: Initial volume of the gas, V1 =800 mL Final volume, V2 = 150 mL Calculation of initial moles of the…

Q: Can a process be spontaneous at one temperature and nonspontaneous at a different temperature?

A: Thermodynamics can be used to explain the spontaneity of a reaction.

Q: How does the standard entropy of a substance depend on its molar mass? On its molecular complexity?

A: Entropy is a thermodynamic property, which is the measure of randomness of a system. Entropy of the…

Q: .Is there a connection between the free-energy change for a reaction and its equilibrium constant?…

A: The relation between the free-energy change for a reaction and its equilibrium constant has to be…

Q: Why is it important in using change in free energy, ΔG, as the thermodynamic parameter for assessing…

A: Thermodynamics is branch of chemistry which deals with heat gained and heat lost by system.

Q: What is the vapor pressure, in mmHg, of ethanol at 52.1 °C? What is the entropy of vaporization at…

A:

Q: calculate the standard reaction entropy of the following chemical reaction:

A:

Q: Question attached

A:

Q: If you have an enthalpy change of -102.2 kJ mol-1 at a temperature of 200C, determine the change  in…

A: Given: Change in enthalpy = -102.2 kJ mol-1 Temperature = 20°C

Q: What is the chemical significance of a positive Gibbs free energy change and what is the chemical…

A: The amount of energy available for doing some useful work is termed as free energy or Gibbs free…

Q: Calculate the standard reaction entropy (∆????∅) at 298 K for the reaction of carbon dioxide with…

A: Standard entropy value:-  ∆S°(CaO) = 40 J/K mol  ∆S°(CO2) = 214J/K mol  ∆S°(CaCO3) = 93J/K mol

Q: For a process that occurs at a constant temperature, does the change in Gibbs free energy depend on…

A: The Gibbs energy change can be defined by the expression as- ∆G=∆H−T∆S where ΔG: Gibbs Free Change…

Q: What is the molar entropy of a pure crystal at 0 K? What is the significance of the answer to this…

A: The third law of thermodynamics states that entropy of a pure crystal at a temperature of zero…

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…

A:

Q: Fill the table with their respective standard entropy of reaction and show the solutions.

A:

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: What are the criteria for spontaneity(a) in terms of entropy and(b) in terms of free energy?

A: The Gibbs free energy is an important parameter to predict the feasibility of a process. The entropy…

Q: Calculate the measurable change in entropy (for the system) when the state of 2.00 mol of diatomic…

A: Change in entropy of system : VfVi = Tf × PiTi × Pf = 408 × 1.50298 × 7.00 = 0.2934  Cv = Cp - R =…

Q: Does the entropy of the system increase, decrease, or staythe same when (a) a solid melts, (b) a gas…

A: (a) Entropy of the system will increase when a solid melts. Randomness of liquid is more than that…

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 when the pressure of a 55.0 g sample of oxygen gas is increased from…

A: Given- w= 55.0 g Molar mass of O2= 32g/mol P1 =625 mm Hg P2 = 1.24 atm Temperature = 250 C =…

Q: Explain which reaction is non-spontaneous and justify your answer in terms of change in enthalpy and…

A: Given : reaction

Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.