What is ΔH° for the following phase change? NaCl(s) → NaCl(l) Substance ΔH°f (kJ/mol) NaCl(s) –411.12 NaCl(l) –385.92 a. 797.04 kJ b. 25.20 kJ c. –797.04 kJ d. –25.20 kJ e. 0 kJ

Q: For the reaction shown below, determine the value of ΔSsurr at 345 K.Express your answer to 3…

A: The objective of the question is to calculate the change in entropy of the surroundings (ΔSsurr) for…

Q: What is that the entropy change of the universe (J/mol-K) when the entropy change of the system is…

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Q: chapter 12:  9) What are ΔH°rxn, ΔS°rxn, and ΔG239.0 K for the following reactions at 239.0 K?…

A: Given Temperature = 239.0°K Compound ΔHºf (kJ/mol) Sº (J/mol • K)  H2S(g)  –20.17  205.6…

Q: d)The ΔH°f of Ar(g) is   1.positive. 2.negative. 3.zero. 4.must be determined experimentally.…

A: The ΔH°f of Ar(g) is 1.positive. 2.negative. 3.zero. 4.must be determined experimentally

Q: Use Hess's law to calculate ΔG°rxn using the following information.               NO(g) + O(g) →…

A: The first thing to do is to change the bottom three reactions to make it look like the top reaction.…

Q: Consider the balanced reaction 3 A + 7 B → 3 C + 7 D and the absolute entropies provided in the…

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Q: Given the information A+B⟶2D  Δ?∘= -682.0 kJ      Δ?∘= 377.0 J/K  C⟶D  Δ?∘= 496.0 kJ      Δ?∘=…

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Q: FeO

A: ∆H°rxn = [ ∆H°f(Fe2O3) ] - [ ∆H°f(FeO) + ∆H°f(Fe) + ∆H°f(O2) ]  ∆H°rxn = [ -822.16 kJmol-1 ] - […

Q: Theoretically, one can obtain zinc from an ore containing zinc sulfide, ZnS, by the reaction ZnS(s)…

A: Answer :-  a) ∆H° = 206.0 (kJ) b) ∆S° = 15.7 (J/K)  c) ∆G° = 201.3 (kJ)  d) Since, ∆H°, ∆S° and ∆G°…

Q: What is the entropy change (in J/K) associated with the formation of 15.0 g of SO2 for the reaction…

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Q: The addition of 121  g potassium fluoride to 591  mL of water (d = 1.00 g/mL) causes the temperature…

A: The mass of solution is calculated as shown,

Q: Is the following reaction spontaneous at room temperature (25.0 °C) ? 2 H2S(g) + 3 O2(g) 2 SO2(g) +…

A: Interpretation: The given reaction is spontaneous at room temperature or not is to be determined. At…

Q: Carbon ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K) C (s, graphite) 0 0 5.7 C (s,…

A: Gibbs energy is a significant quantity that tells us the useful work performed by a system. It is…

Q: 6. Calculate AG for the combustion of propane. C3H8(g) + 50₂(g) → 3CO₂(g) + 4H₂O(g) C3H8(g) -24.5…

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Q: Consider the following reaction and its associated ΔHrxn. CH3OH=CO+2H2,   ΔHrxn = 90.70 kJ/mol…

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Q: 2. Nitric oxide reacts with chlorine to form NOCI: 2NO(g) + Cl2(g) → 2NOCI(g) What is AG°xn for this…

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Q: A particular reaction has a ΔHo value of -141. kJ and ΔSo of -104. J/mol K at 298 K. Calculate ΔGo…

A: We are given :648. K Change in enthalpy (ΔHo)  =   -141. kJ change in entropy (ΔSo)  = -104. J/ K =…

Q: Calculate ΔG rxn for the following reaction at 639.2 K if the reaction below has a ΔH o rxn of…

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Q: Are the values of ΔHvap and ΔSvap for boiling water going to be positive or negative? Explain if…

A: Given statement is :  Are the values of ΔHvap and ΔSvap for boiling water going to be positive or…

Q: For a particular reaction, Δ?∘=−28.4 kJ/mol and Δ?∘=−87.9 J/(mol⋅K). Assuming these values change…

A: Given: ΔHo = -28.4 KJ/mol = -28400 J/mol. And the value of ΔSo = -87.9 J/mol.K.

Q: Calculate ΔGrxn at 7.2 °C for a reaction that has ΔHrxn= 29.4 kJ and ΔSrxn= 78.08 J/K

A: Given :-  Temperature = 7.2°C  ΔHrxn= 29.4 kJ  ΔSrxn= 78.08 J/K  To calculate :-  ΔGrxn

Q: In a typical cold pack (used for sports injuries), a salt such as ammonium nitrate is kept in a…

A: Dissolution of ammonium nitrate in water is given by, NH4NO3(s)→H2O(l) NH4+(aq)+NO3-(aq)   ∆H=+25.09…

Q: Determine AS° for 2 03(g) → 3 02(g). Substance S° (J/mol·K) Оз (9) 239 О2 (9) 205

A: Degree of disorder in a particular system is termed as entropy. Given: Entropy of O3 (g) = 239…

Q: An example of a reaction where ∆G = 0 is   C(graphite)→C(diamond)   any synthesis reaction…

A: We know, The value of  ∆G = 0 when the reaction is at an equilibrium.

Q: Calculate the standard free energy change (kJ/mol) for the reaction shown at a temperature of 298.15…

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Q: Calculate AS° for NH3(g) + HCI(g) NH.CI(s)- Substance S (J/mol·K) NH3 (g) 192.5 HCI (g) 186.7 NH4CI…

A: Using the following formula, we can calculate the entropy of the reaction,…

Q: for this reaction: H2O(g) →  H2O(l) → (gets hot, s

A: When water changes its states from gas to liquid there is a change in states of water from gaseous…

Q: The value of ΔH° for the reaction below is −5314 kJ.  The amount of heat that is released by the…

A: Balanced chemical equation: 2C4H10(g) + 13O2(g)  → 8CO2(g) + 10H2O(l)      ΔH° =  −5314 kJ From the…

Q: When 10.00 grams of NH4CN (s) is dissolved in 120.0 grams of water inside a perfect calorimeter, the…

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Q: What is the lowest temperature at which the reaction of C(s) with H2O(g) to produce H2(g) and CO(g)?…

A: The lowest temperature would be 981..3153°C.

Q: If ΔS ̊sys = -198.3 J/K, is the reaction spontaneous at 25 ̊C. -ΔSuniv = ΔSsys + ΔSsurr > ? -…

A: Enthalpy change of the reaction can be calculated as the difference between the enthalpy of…

Q: Calculate the standard free energy change (kJ/mol) for the reaction shown at a temperature of 298.15…

A: According to the question we have a reaction between the nitrogen gas and oxygen gas which is as…