If the temperature of the surroundings is 146.55 °C, calculate the entropy change (in J/K) for the system (AS sys), surroundings (AS sur) and universe (AS universe) when 18.2 g of gaseous phenol (C6H6O) condenses. Report your answers to two decimal places. Tfus(°C) 40.90 Tvap (°C) 181.87 AH°fus (kJ/mol) 11.29 AHⓇ vap (kJ/mol) 45.69 1. AS sys Submit Answer Tries 0/5 2. AS sur Submit Answer 3. AS universe Submit Answer Tries 0/5 Tries 0/5

The heat of fusion AH, of methanol (CH,OH) is 3.16 kJ/mol. Calculate the change in entropy AS when 23. g of methanol melts at -98.0 °C. Be sure your answer contains a unit symbol. Round your answer to 2 significant digits. 0 0 X H 010

In the upper atmosphere, ozone is produced from oxygen gas in the following reaction. 3O2(g) → 2O3(g) Calculate ΔHo AND ΔSo for ozone formation. (Enter your answer in kJ and give 3 significant figures).

Consider the reaction: CCI4(g) + CO2(g) → 2COCI2(g). Calculate AG (in kJ) for the reaction at 25°C under the following conditions: Pcc4 = 0.185atm, Pco2 = .125atm, and Pcoci2 = 0.750atm. CCI4(g) CO2(g) COCC2(g) AG° (kJ/mol) -62.3 -394.4 -204.9 AG =

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

The heat of vaporization AH, of heptane (C-H₁6) is 31.2 kJ/mol. Calculate the change in entropy AS when 736. g of heptane condenses at 98.4 °C. Be sure your answer contains a unit symbol. Round your answer to 3 significant digits. x10 ロ・ロ X H ■

What is the change in entropy, AS, for the following reaction? Use Table G in your book for values of standard entropies. Your answer should be in J/K mol. CaCO3(s) + 2 H'(aq) → → Ca² (aq) + H₂O(l) + CO2(g) O 264.9 J/K mol O 118.6 J/K mol 394.3 J/K mol 137.7 J/K mol 2

The heat of fusion AH, of acetic acid (HCH₂CO₂) is 11.7 kJ/mol. Calculate the change in entropy AS when 5.7 g of acetic acid melts at 17.0 °C. Be sure your answer contains a unit symbol. Round your answer to 2 significant digits.

Enthalpy and Gibb's Free Energy Chemical energy is released or absorbed from reactions in various forms. The most easily measurable form of energy comes in the form of heat, or enthalpy. The enthalpy of a reaction can be calculated from the heats of formation of the substances involved in the reaction: AHxn = AH₂ (products) - AH (reactants) Entropy change, AS°, is a measure of the number of energetically equivalent microstates introduced into the system during the reaction. The degree of spontaneity of a reaction is represented by the Gibbs free energy, AGO. The Gibbs free energy depends on both the enthalpy and entropy changes that take place during the reaction: AG=AH° - TAS° where T is standard temperature, 298 K. ▼ Part A Calculate the standard enthalpy change for the reaction where the heats of formation are given in the following table: ΔΗ Substance (kJ/mol) A B C D -241 -407 191 -501 Express your answer in kilojoules. ► View Available Hint(s) {—| ΑΣΦ AHixn= 2A+B=2C+2D ? kJ…