Adding sidewalk deicer (calcium chloride) to water causes the temperature of the water to increase. If solid CaCl2 is the system, what are the signs of ΔSsys and ΔS surr? Hint: Consider writing a reaction showing how CaCl2 dissolves in water to determine how the entropy of the system changes.

Q: The graph represents the energy change of a chemical reaction. Which must be true about the entropy…

A: Given, the energy profile diagram: We have to find the correct statement about the entropy of the…

Q: A reaction has been determined to be AHrxn > 0, ASrxn <0. Select all the correct answers associated…

A:

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

A: ANSWER IS

Q: What is the main reason why ΔG or change in free energy is important for determining the spontaneity…

A: ∆G° is the Gibbs free energy which tells about the spontaneity of the reaction.  If ∆G° = +ve…

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A: when a gas is converted to solid and there is decrease in number of particles,

Q: Define entropy and state the second law of thermodynamics?

A: Entropy is a thermodynamic property which shows the inaccessibility of a system's thermal energy. It…

Q: Calculate the change in entropy that occurs in the system when 55.0 g of water vaporizes from a…

A: Given data contains, Mass of water is 55.0 g. The boiling point is 100.0°C. Heat of vaporization is…

Q: For a particular reaction, Δ?=120.5 kJ/mol and Δ?=758.2 J/(mol·K). Calculate Δ? for this reaction at…

A: Given data is  ΔH = 120.5 KJ/mol = 120500 J/mol And ΔS = 758.2 J/mol.K Since ΔG = ΔH - TΔS where T =…

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A: Enthalpy change is defined as the amount of heat released or absorbed in a chemical reaction. It is…

Q: 18. Ice sublimes to gas 19. Water vapor condenses onto your window

A: Please find your solution below : Entropy of a system is defined as the measure of disorder or…

Q: The enthalpy for a certain process is 121.9 kJ/mol and the entropy for the process is 454.8 J/K.  At…

A: We are given that, ∆H = 121.9 KJ/mol = 121.9 × 10^3 J/mol  ∆S = 454.8 J/K

Q: For the reaction2CO(g) + 2NO(g)2CO2(g) + N2(g)ΔH° = -746.6 kJ and ΔS° = -198.0 J/KThe maximum amount…

A: The given balanced equation can be expressed as: Calculate the standard free energy by using the…

Q: Consider the reaction A → B with ΔS° = -46.550 J/(K·molrxn). What should be the ΔS° in J/(K·molrxn)…

A: ΔS° for the reaction  5 B → 5 A

Q: Explain what is meant by “free energy” in a system. Will a reaction that proceeds spontaneously have…

A: In chemical terms, free energy refers to Gibbs free energy of the system. The symbol for Gibbs free…

Q: A process increases the entropy of the system by 128 J/mol K and absorbs 54 kJ/mol of heat from the…

A: Given: Change in entropy (∆S) = 128 J/mol•K Absorbed heat=54 kJ/mol =54×103 J/mol    To determine…

Q: .

A:

Q: How ΔGo is related to ΔHo and ΔSo . Illustrate by Equation ?

A: Given terms,    ΔGo , ΔHo and ΔSo  G - free energy H - enthalpy S - entropy

Q: For a certain reaction, ΔH = -35.4 kJ/mol and ΔS = -85.5 J/K mol. Is this reaction endothermic or…

A:

Q: Change Is this change spontaneous? O Yes. A solid precipitates from a solution, releasing heat as it…

A:

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

A: Q1. Since the reaction is endothermic, that means you have to provide heat during the reaction,…

Q: For the reaction: F2 (g) → 2 F (g) Which is true about the enthalpy and entropy of reaction?…

A: The given reaction is the non-spontaneous process and it is endothermic reaction. F2 (g) → 2 F (g)

Q: There is a natural tendency for the universe to have increased entropy.

A: Given statement is true or false ?

Q: Predict the sign of ΔSfor these processes: 2 H2(g) + O2(g) → 2 H2O(l) H2O(l) → H2O(s) CaCO3(s) →…

A: Entropy of gases is higher than of liquid and solid. Order of entropy gas&gt; liquid &gt;solid

Q: Define Standard States and Standard Entropy Changes?

A: Generally in chemistry standard state can be defined as the reference pint used to calculate its…

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

A: A reaction is said to be spontaneous if a change in Gibbs free energy is negative.…

Q: Find the the ∆H°rxn if ∆G°rxn is 420 kJ/mol and ∆S°rxn is -143 J/mol*k *refer to the photo attaced.

A: Since there are multiple questions, we are authorized to answer only the first one, that is, no. 1.…

Q: The sun catalyzes the atmospheric reaction as seen below. 2N2O(g)+O2(g)→4NO(g) This reaction would…

A: Answer :-  The reaction will have a Positive ΔS , because the moles of gas increases.…

Q: In freezing a mole of liquid water at the freezing point; the enthalpy of fusion is 6.0lkJ/mol…

A: The enthalpy of fusion is 6.01 KJ/mol To determine : entropy of system , surrounding and universe

Q: Calculate the change in entropy that occurs in the system when 55.0 g of water vaporizes from a…

A: Given information- mass of water = 55.0 g  molar mass of water = 18.02 g/mol temperature, T = 100.0…

Q: TRUE OR FALSE 1. Lowering the temperature of the system will lead to an increase in entropy. 2.…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: What do you expect for the sign of ΔS in a chemicalreaction in which 2 mol of gaseous reactants are…

A: is the change in entropy. Entropy is the measure of randomness or disorders. In a reaction, if the…

Q: The enthalpy change for a reaction can be calculated using the formation enthalpies of the products…

A: Each chemical reaction is associated with the donation or acceptance of a certain amount of energy.…

Q: The standard enthalpy change and standard entropy change for the reaction are: A,HP = -666.2 kJ…

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Q: 1. A piece of hot metal (400 K) is place inside a beaker of cold water (285 K). Which of the…

A: Given that The temperature of the metal piece = 400 K The temperature of the cold water in beaker…

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: When you add water to a small amount of sodium chloride (NaCl), the solid dissolved and the solution…

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Q: Liquid butane combust in air. Predict the sign for Delta G, Delta S, and Delta H at 25 C:

A: The balanced chemical equation for combustion of butane will be- 2C4H10 (l)  +  13O2 (g)     →…

Q: Consider a chemical reaction with a change in enthalpy of 845 kJ/mol and a change in entropy of…

A: Gibbs free energy, called G, incorporates enthalpy and entropy into a single value. The shift in…

Q: When heat is added to the surroundings, the entropy of the surroundings increases. How does Ssurr…

A: We know that Entropy is defined the randomness of system. Entropy is represent by the symbol "S"

Q: What is the precise definition of entropy?

A: Entropy is a thermodynamic state function that determines randomness in a system.  When we raise…

Q: Heat is consumed to mold a plastic figurine. For this process, is the ΔH (change in enthalpy)…

A: "To get remaining parts solved please repost the complete question and mention the parts to be…

Q: The ionization constant for water is 1.14*10-15 at 0 oC and 9.60*10-14 at 60.0 oC. i) Calculate the…

A: A reaction is said to be spontaneous if its Gibbs free energy is negative. We can calculate the…

Q: Consider the dissolution process of solid NaOH in water, where the solution temperature increases.…

A: Given,The dissolution process of solid NaOH in water, where the solution temperature increases.

Q: Which of the following statements define the third law of thermodynamics? O Process that requires…

A: The statement which defines the third law of thermodynamics is to be explained.     Third law of…

Q: Define enthalpy, entropy and free energy. Include their chemical symbols in your explanation.

A: