Calculate ΔrS° for the reaction 4Cr(s) + 3O2(g) → 2Cr2O3(s) Substance:     Cr(s)    O2(g)    Cr2O3(s) S°(J/K·mol):   23.8    205.1      81.2 Express your answer to one decimal place. ΔrS°  = Answer J/K mol

Q: Without doing any calculations, determine the sign of ASys and ASurr for each chemical reaction. In…

A: To determine the sign of ∆S syst and ∆Ssurr for the following reactions:

Q: If ΔHΔHDH = -70.0 kJkJ and ΔSΔSDS = -0.200 kJ/KkJ/K , the reaction is spontaneous below a certain…

A: In this question we want to determine the temperature ( below this Temperature Reaction is…

Q: Calculate the entropy change, AS° for the following processes, a. vaporization of ethyl alcohol,…

A: Entropy is a measure of disorder or randomness of a substance. Change in entropy is defined as the…

Q: Calculate how much heat (in kilojoules) a hand warmer containing 23.0 g of iron powder produces.

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Q: Photosynthesis in plants converts carbon dioxide and water into glucose and oxygen. Calculate the…

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Q: For each reaction, calculate AHn, ASn , and AGn at 25 °C and state whether or not rxn rxn the…

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Q: Without doing any calculations, determine the sign of AS and ASu for each chemical reaction. In…

A: Entropy is a unit of randomness.More the number of moles,more will be the entropy.Change in entropy…

Q: 12. Consider the oxidation of iron metal 4Fe +302g → 2Fe,O) . by determining the sign of Astotal,…

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Q: 2 ClO2 (g)   +  2 TiCl4 (l)    →     2 TiO2 (s)   +   5 Cl2 (g)         Delta H =  – 343.8 kJ when…

A: Please have a look on the solutiion:

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: 73. Given the following data Ca(s) + 2C(graphite) → CaC2(s) Ca(s) + O,(g) –→ CaO(s) CaO(s) + H,O(1)…

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Q: For the reaction below AH = +92.2 kJ, and AS = +198.7 J/K. Estimate the temperature at which this…

A: To find the temperature.

Q: Above what temperature does the following reaction become nonspontaneous?               2 H2S(g) +…

A: The balanced reaction taking place is given as, => 2 H2S (g) + 3 O2 (g)  → 2 SO2 (g) + 2 H2O (g)…

Q: 37. Without doing any calculations, determine the signs of AS and ASur for each chemical reaction.…

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Q: Calculate the temperature at which the reaction changes from a spontaneous to non-spontaneous…

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Q: The dissolution of ammonium nitrate occurs spontaneously in water. As NH4NO3 dissolves, the…

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Q: Above what temperature does the following reaction become nonspontaneous?         2 H2S(g) + 3…

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Q: Calculate the entropy change for the following reactions, using the tabulated standard molar…

A: Nitrogen oxide reacts with oxygen to form nitrogen dioxide, the equation for the balanced chemical…

Q: Which of these processes are nonspontaneous? Are the nonspontaneous processes impossible?a. a bike…

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Q: Which are spontaneous at high temperatures? Choose one or more: A 2H,S(g) + 30,(g) –→ 2H,0(g) +…

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Q: Which of the following statements is true? Select one: The number of microstates,W, is the number of…

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Q: For a reaction for which ∆H = -142 kJ/mol and ∆S = -178 J/mol･K, which of the following statements…

A: Applying spontaneity criteria for ∆G -ve.

Q: Consider the following reaction   AgBr(s) → Ag+(aq) + Br−(aq), ΔGo = +69.1 kJ   Calculate ΔG for the…

A: The relation between ∆G and ∆Go is  given by: ∆G = ∆Go + RT lnQ Where, R = universal gas constant,…

Q: For the reaction at 298 K, the values of H and S are 58.03 kJ and 176.6 J/K, respectively. What is…

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Q: For the reaction below ∆G° = + 33.0 kJ, ∆H° = + 92.2 kJ, and ∆S° = + 198.7 J/K. Estimate the…

A: We wil use the Gibbs helmholtz equation to calculate the temperature when ∆G is zero. And above this…

Q: Methanol is burned as fuel in some race cars. This makes it clear that the reaction is spontaneous…

A: According to the second law of thermodynamics, the free energy change of the spontaneous process is…

Q: 4 NH3 (g) + 5 O2 (g) -4 NO (g) + 6 HzO (g) ArHo = -906 kJ For the reaction above, predict the sign…

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Q: Which of these processes are nonspontaneous? Are the nonspon-taneous processes impossible? a. a bike…

A: Spontaneous processes are those which take place on their own such as rusting of iron. These are…

Q: A student calculated that for a given reaction, ΔS = 22 J/K and ΔH = 6,028 Joules. At which…

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Q: For each process predict the sign of the entropy change taking place. A. Solid sugar is added to…

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Q: Which of the following sets of conditions is true for an exothermic reaction that is spontaneous at…

A: Enthalpy, entropy both of these two factors determine the fate of reaction. The reaction either…

Q: What is the free energy change for the process shown here under the specified conditions? T = 25…

A: We know that ∆G = ∆G° + RTlnQ ..(1) Here, Q = pH2^3*pN2^1/pNH3^2 = (0.250)^3(0.870)/(12.9)^2 =…

Q: Without doing any calculations, determine the sign of AS and ASu for each chemical reaction. In…

A: a) Rewrite the reaction as follows 2CO(g) +02(g) → 2C02(g) The number of moles of gases decreases…

Q: Consider the following reaction: CaO(s) + CO2(g) → CaCO3(s); ΔG° = –130.9 kJ at 298 K At what…

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Q: (b) 2 Na(s) + 2 H20(1) → 2 NaOH(aq) + H2(g) As° J/K rxn As° × 10 J/K (enter your answer in…

A: Given data :- 2Na(s)    +     2H2O(l)     →   2NaOH(aq)    +    H2(g) ∆S for Na = 51.05 J/mol.K ∆S…

Q: For the reaction below ΔG° = +33.0 kJ, ΔH° = +92.2 kJ, and ΔS° = +198.7 J/K. Estimate the…

A: The given data : ΔG° = 33.0 kJ ΔH°= +92.2 kJ ΔS°= +198.7 J/K To determine : The temperature of the…

Q: ΔHorxn = 102 kJ and ΔSorxn = 299 J K-1. Determine the minimum temperature (in K) at which the…

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Q: For a particular chemical reaction, ΔH = 4.3 kJ and ΔS = –19 J/K. Under what temperature condition…

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Q: -Find AH, AS, and AG. Is this reaction exothermic and is it spontaneous? NO (g) + ½ O2 (g) -> NO2…

A: The given reaction is: From the given values- ΔH and ΔS can be calculated as follows: where m and…

Q: y 20. Which process is most likely nonspontaneous at 25°C and 1 atm? (A) A rock climber repels down…

A: Almost all processes are spontaneous. Spontaneous processes are the process which occurs without the…

Q: Given the following reaction: 2NO(g) + Cl2(g) 2NOCl(g) DHorxn = -75.5kJ 1. Is the reaction…

A: The reaction taking place is given as, => 2 NO (g) + Cl2 (g) -------> 2 NOCl (g)…

Q: What is the free energy change for the process shown here under the specified conditions? T= 25 °C,…

A: Calculation of QP: QP=PN2×PH23PNH32=0.870×0.250312.92=0.000327

Q: Consider the reaction for the decomposition of carbon tetrachloride gas:CCl4(g)¡C(s, graphite) + 2…

A: (a) The given reaction is, CCl4g→Cs,graphite+2Cl2g ∆H=+95.7 kJ∆S=+142.2 J/KT=25°C=25+273K=298 K

Q: Calculate the temperature in kelvins above which this reaction is spontaneous.

A: We have to Calculate the temperature in kelvins above which this reaction is spontaneous.

Q: One of the reactions that destroys ozone in the upper atmosphere is NO(g) + O3(g) ⇒ NO2 (g) + O2(g)…

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Q: For a nonspontaneous reaction , AS° = 189 J/K, and AH° = 76.3 KJ. At what temperature this reaction…

A: ∆G° = ∆H° - T∆S°  ∆G°<0 for spontaneous reactions

Q: When two crystalline solids X and Y are mixed in a beaker at room temperature, a spontaneous…

A: Given: Temperature is decreased or low Reaction is spontaneous

Q: The dissolution of ammonium nitrate occurs spontaneously in water. As NH4NO3 dissolves, the…

A: According to the second law of thermodynamics, the spontaneous nature of the reaction is determined…