Find the temperature (in K) above which a reaction with a ΔH of 170.8 kJ/mol and 64.5 ΔS J/K·mol becomes spontaneous. Express your answer to the correct number of significant figures, in scientific notation and include the unit with your answer.

Q: Estimate the boiling point of an unknown substance in deg C if the latent heat of vaporization of…

A: We have to predict the boiling point.

Q: Q1.) For a certain chemical reaction, ΔH∘ = - 35.4 kJ and ΔS∘ = - 88.0 J/K 1. Exothermic or…

A: Answer 1: Exothermic or Endothermic? ΔH∘, represent heat content of the system which is expressed by…

Q: At what temperatures is the following process spontaneous at 1 atm? ΔH° = +20 kJ and ΔS° = - 50 J/K

A: The reaction is always non-spontaneous at all temperatures.

Q: Using Thermochemical Data, calculate ΔS for the following reaction. Is entropy increasing or…

A: ANSWER IS

Q: (Q71) Consider the hydrogenation of ethene to form ethane that occurs according to the following…

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Q: For the reaction: CS2(g) + 2 H2S(g) CH4(g) + 4S(s) AH = -175 kJ and AS = - 495J/K a. At what…

A: For a reaction to occur spontaneously, delta G should be less than 0

Q: In the late eighteenth century Priestley prepared ammonia by reacting HNO3(g) with hydrogen gas. The…

A: A reaction can be categorized as an endothermic or exothermic reaction. If the energy is released…

Q: Nitrogen oxides undergo many interesting reactions in the environment and in industry. Given the…

A: The enthalpy change for the overall equation is - 109.5 KJ.

Q: If the helium was open to the atmosphere and you heated it from 25°C to 100°C, would the change in…

A: the change in entropy will be larger  than heating it in a sealed box.

Q: After a snowfall the snow compacts and when the sun shines on it, it sublimes readily.  What is the…

A: Given :  After a snowfall the snow compacts and when the sun shines on it, it sublimes readily.…

Q: Define spontaneity of a reaction in terms of ∆G. Determine if a process is spontaneous based on…

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Q: THERMODYNAMICS: Given the following hypothetical thermochemical equations: 2QJ3 (g) + 3Q2X (g) → 4Q2…

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Q: 6.Sodium reacts violently with water according to the equation: 2 Na(s) + 2 H2O(l) → 2 NaOH(aq) +…

A: Now as the temperature of the water is higher, it signifies that the reaction was endothermic and…

Q: Determine the entropy difference between solid and liquid states for a substance melting at 100 °C…

A:

Q: 1. Classify the following processes as "Spontaneous" or "Non-spontaneous": (i) (ii) (iii) (iv) (v)…

A: Spontaneous process is the type of  random process is one that takes place alone and has no external…

Q: Above what temperature does the following reaction become nonspontaneous? N204(9) + 4 H2(g) → N2(9)…

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Q: If a process is exothermic and not spontaneous, then what must be true?     ∆S 0   ∆H > 0   ∆H…

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Q: Consider the combustion of butane gas:C₄H₁₀(g) +O₂(g) →4CO₂(g) +5H₂O(g) (a) Predict the signs of…

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Q: How many microstates are available to a substance in its liquid state

A: In statistical mechanics, a microstate is a specific microscopic configuration of a thermodynamic…

Q: 6.) The diagram below shows the deposition of iodine vapor at room temperature. Which statement is…

A: The ordered system is the indication of low entropy. While less orderliness is the indication of an…

Q: An imaginary machine takes 9,000 J of heat from a hot reservoir and 3,000 J of heat from a cold…

A: Given : An imaginary machine takes 9,000 J of heat from a hot reservoir and 3,000 J of heat from a…

Q: Which of the following statements correctly describe the second law of thermodynamics? I. Heat will…

A: Second  law of thermodynamics

Q: Using enthalpies of formation (See the Supplemental Data), calculate ΔH° (in kJ) for the following…

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Q: Which of the following processes are spontaneous a. cooling of a hot flat iron b. drop of ink…

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

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Q: 63. Calculate ΔH°ΔH° for the process Sb(s)+5/2Cl2(g)⟶SbCl5(s) from the following…

A: The required reaction is: The given reactions are:

Q: 5. Which of the following are factors that determine whether a reaction is spontaneous or…

A: Any process is called spontaneous if there is not any output force is applied during the process or…

Q: 6) Consider H;0 going from the gas phase to liquid phase to solid phase. Describe the changes in…

A: In the vapor state, the gas phase of water, water molecules have the highest kinetic energy and this…

Q: Chemistry Table 1 Standard Enthalpies and Entropies Substance Standard enthalpy of formation…

A: Spontaneity of a reaction can be determine from the value of ∆G of reaction.

Q: Read the descriptions of physical or chemical changes in the table below. Then decide whether the…

A:

Q: Which of the following would be expected to have positive entropy change?   Cooling of nitrogen…

A:

Q: From your knowledge of microstates and the structure of liquid water, explain the difference in…

A: Finding: Microstates To find Structure of liquid water

Q: III of thermodynamics. Explain your law.

A:

Q: Two systems, each composed of two particles represented by circles, have 20 J of total energy. Which…

A: Given data : Two systems, each compound of two particles , represented by the circkes have 20 J of…

Q: 2. Give an example of an endothermic process that is spontaneous b. an exothermic process that is…

A: Spontaneous process :-          It is a process, in which process occurs without any external input…

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: What are the thermodynamic quantities of a system that affect the amount and sign of the internal…

A: since you have posted multiple questions. we are entitiled to answer first question only. please…

Q: 4. According to the 2 law of thermodynamics, ASi must be positive for a process to be spontaneous.…

A: SYSTEM: System is that part of universe which we are experimenting on or which we are considering.…

Q: A reaction has ∆H=+19.8 kJ and ∆S=+95.3 J/K at 298K.  Calculate the temperature in Kelvin that the…

A: Given information:  ∆H=+19.8 kJ ∆S=+95.3 J/K  T = 298 K ∆G = ? We have to find out ∆G from the given…

Q: In which of the following processes does the entropy of the system decrease? Select one: H2(g) +…

A: > In a chemical reaction if gaseous moles increases than entropy increase. > for gases if…

Q: A mathematical interpretation of First Law of Thermodynamics is: O a. Q=ART O b. Q=AU + A C. Q=RT

A: Given  First law of thermodynamics

Q: Which of the following processes is both exothermic (at 1 atm) and spontaneous? A) Sublimation of…

A: The process which is both exothermic and spontaneous is condensation of water at 99.5°C.

Q: Calculate the temperature, in Kelvins, at which the decomposition of calcium carbonate becomes…

A: Given:The reaction is

Q: Consider the decomposition of dinitrogen tetroxide, N2O4, into nitrogen dioxide, NO2.  N2O4…

A: The balanced reaction given is, => N2O4 (g) → 2 NO2 (g) The thermodynamic data given is,…

Q: Given the following reaction and its enthalpy change, and the sign of the entropy change that you…

A: A reaction is said to be spontaneous if the change in the Gibbs free energy of the reaction comes…

Q: (Q77) The standard Gibbs free energy (AG°rxn) for the formation of sulfur trioxide from sulfur…

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Q: Calculate ΔH° for the process Sb(s) + 52Cl2(g) ⟶ SbCl5(s) from the following information: Sb(s)…

A: According to the Hess’s law of Constant heat Summation, regardless of the number of steps or stages…

Q: If a process is exothermic and not spontaneous, then what must not be true? a) AG>0 b) AH0 d) AS<0

A: For exothermic process, ΔH &lt; 0 For non spontaneous process, ΔG &gt; 0

Q: Which of the following results in a decrease in the entropy of the system? Group of answer choices…

A: Since we know that Entropy depends upon on the number of moles of gas molecules on products side and…

Q: If the process is exothermic and not spontaneous, then what must be TRUE? O a. AS0 O c. AH=0 O d.…

A: