For the following chemical reaction, predict the sign of the change in entropy (AS). 6Cl2 (g) + 2Fe₂O3 (s)→ 4FeCl3 (s) + 302 (g) O a. AS < 0 O b. Not enough information O C. O d. AS > 0 AS = 0

2. Which of the following statements regarding entropy is FALSE? a) Sugar poured into a container of water dissolves. The entropy of the sugar and water increases. b) A block of dry ice sublimates to CO2 gas. The entropy change is positive. c) Wood bums and becomes ash, smoke and gases. The entropy change increases. d) Building a house from building blocks (bricks, stones and mortar). The entropy increases. e) A snowman melts on a spring day. 3. Which of the following processes involve an increase in AS ? i. Br:() H. 2H:(9) + O:(g) il. 2KCIO:(s) iv. 2H9O(s) Br:(g) 2H:0(g) 2KCI(s) + 30:(g) 2Hg(1) + O:(g) a) i only b) i only c) i and iv only d) i, i, and iv only e) i, ii, ii, and iv only 4. Predict the sign of AS" of the reaction, and indicate the reason for the change 2H:(g) + O:(g) 2H;0(g) (Select all that apply.) il. i. iv. due to the dissolving of a compound due to the precipitation of a compound due to an increase in the number of moles of gas due to a decrease in the number of…

Calculate the entropy change when a gas condenses at its boiling point. Calculate the entropy change when when 2.47 moles of mercury condenses at its boiling point of 357°C. The heat of vaporization of Hg is 59.3 kJ/mol. Triangle S=____ J/K Predict the sign and calculate TriangleS° for a reaction Consider the reaction 2CO2(g) + 5H2(g) ——->C2H2(g) + 4H2O(g) Based upon the stoichiometry of the reaction the sign of triangleSdegrees rxn should be:(positive or negative). Using standard thermodynamic data (in the Chemistry References), calculate triangleSrxn° at 25°C. Triangle S°= ____J/K•mol

A hot rock ejected from a volcano’s lava fountain cools from 1100C to 40.0C, and its entropy decreases by 950 J/K. How much heat transfer occurs from the rock?

The heat of vaporization of carbon disulfide, CS2, at 25°C is 27.2 kJ/mol. What is the entropy change when 1.60 mol of vapor in equilibrium with liquid condenses to liquid at 25°C? The entropy of this vapor at 25°C is 243 J/(mol.K). Entropy change J/K = What is the entropy of the liquid at this temperature? Entropy J/K =

Given the following reaction: 2NO(g) + Cl2(g) 2NOCl(g) DHorxn = -75.5kJ 1. Is the reaction exothermic or endothermic? 2.Does the entropy increase, decrease, or stay the same as reactants form products? 3.Calculate the DGorxn at 10oC and indicate whether the reaction is spontaneous or nonspontaneous. SfoNO = 210.65 J/K; SfoCl2 = 223 J/K; SfoNOCl = 261.6 J/K

For the following reactions, indicate whether the entropy of the system increases, decreases, or remains nearly the same. a. Al3+(aq) + 3 OH-(aq) → Al(OH)3(s)b. CaCO3(s) → CaO(s) + CO2(g)c. Mg(s) + Cu2+(aq) → Mg2+(aq) + Cu(s)

1. Please consider 0.15 gm of Constantan (a Cu/Ni alloy widely used in thermocouples, c = 390 J/•K-kg) that cooled through exposure to the laboratory atmosphere (T 22 •C) from 620 C to 20 C. a. Please determine the change in entropy of the Constantan (in J/ K- kg). b. Please determine the change in entropy of the laboratory atmosphere (in J/ K-kg). c. Please determine the change in entropy of the universe (in J/ K-kg). %3D

given rgetable of standard molar entropy values of each substance in the reaction below, what is the standard change in entropy, delta s, for the following reaction? 2CH3OH(g)+3OH2- 2CO2(g)+4H2O(g) Substance= CH3OH(g) S(J/mol•K) 240 Substance=O2(g) S(J/mol•K) 205 Substance=CO2(g) S(J/mol•K) 214 Substance=H2O(g) S(J/mol•k) 189 a. -352 J/K b. -1302 J/K c. 315 J/K d. 89 J/K E. 1830 J/K

The normal boiling point of ethanol, C2H5OH, is 78.3°C, and its molar enthalpy of vaporization is 38.56KJ/mol. What is the change in entropy in the system when 68.3 g of ethanol vapor at 1 atm condenses to liquid at the normal boiling point? O 163J/K O 160J/K O -163 J/K O -160J/K