Which of these statements is true? (a) All spontaneous reactionshave a negative enthalpy change (b) All spontaneousreactions have a positive entropy change (c) All spontaneousreactions have a positive free-energy change (d) All spontaneousreactions have a negative free-energy change (e) Allspontaneous reactions have a negative entropy change

Q: Which change will result in an overall decrease of entropy? (A) CaCO:(s)→CAO(s) + CO:(g) (B)…

A: Which change will result in an overall decrease of entropy ?

Q: Which of the following statements is true?         (A) The total energy and entropy of the universe…

A: Correct answer is (B) The total energy of the universe is constant, but the entropy is increasing.…

Q: Which of the following reactions is expected to have a negative entropy change? 4NH: (g) + 50: (g) –…

A: Entropy is the degree of randomness . When the system is changed form Solid to liquid the degree of…

Q: A spontaneous process usually involves an increase in temperature (an exothermic reaction), yet when…

A: Solution- The reaction is favorable when it causes an enthalpy decrease and an increase in system…

Q: Given the reaction coordinate diagrams below, which of the following reactions will me products at…

A: A reaction coordinate diagram is a graphical representation of energy and reaction progress. It…

Q: Based on the AHand AS values for a given chemical reaction, it is possible to predict whether the…

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Q: A chemical reaction that happens quickly is spontaneous, and a reaction that happens slowly is…

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Q: AH-2044 kJ and AS-103 J/K For reaction: C₂H₂(g) + 5O₂(g) + 3 CO₂ (g) + 4H₂O(g) ta) Calculate AG at…

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Q: A student places a piece of solid iron into a solution containing copper(II) ions. 7 (a) Write the…

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Q: What is the free energy change at 25°C for the reaction below, if ΔGfo(CH4(g)) = -50.790 kJ/mol,…

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Q: What

A: We will use relation between Gibbs energy and reaction quotient

Q: Explain the difference between a spontaneous and non-spontaneous process, and provide an example of…

A: Difference between spontaneous and non-spontaneous process :

Q: (a) 2CH4(g) + 2CO2(g) CH4(g) + 2H0(g) + 2CO (g) (b) CO2(g) + 3H;(g) → CH;OH(g) + H2O(g) (c)…

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Q: |27. Explain why (a) some exothermic reactions do not occur spontaneously, and (b) some reactions in…

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Q: Which substance has the higher entropy?(a) dry ice (solid CO2) at -78°C or CO2(g) at 0 °C(b) liquid…

A: Entropy is defined as the degree of randomness or disorderliness of the System.   if the molecules…

Q: How can a system or chemical reaction have a negative entropy change and be spontaneous?

A: Chemical reaction:

Q: Hi, I need help with this step-by-step please thank you.

A: For any reaction that proceeds spontaneously, the value of free energy that is Delta G remains…

Q: Question 20 of 20 Submit A reaction will be spontaneous at all temperatures if. A) AH and AS are…

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Q: For a reaction to be نقطة واحدة spontaneous, the sign of Gibbs Free Energy G is The sign of G has no…

A: For a reaction to be sponteneous, the sign of Gibbs free energy is always negative.

Q: 3.) Consider the vaporization of liquids water to steam at a pressure of 1 atm. (a) is the process…

A: 3)  Vaporisation is an endothermic process as it involves absorption of energy to convert from…

Q: Which of the following statements is true? O All spontaneous reactions have a negative enthalpy…

A: Spontaneous process: It is process that happens it own and continues in its own way and do not…

Q: 29 O O O 0 0 For the following reaction, AH = 137 kJ, ASn = 120 J/K. C₂H6(g) → C₂H4(g) + H₂(g) This…

A: Given data :  deltaH= 137 KJ = 137000 J( 1 KJ= 1000J)  deltaS = 120 J/K  The reaction :  C2H6(g)…

Q: 38. Based on the AHand AS values for a given chemical reaction, it is possible to predict whether…

A: We know according to Thermodynamics ∆G = ∆H -T∆S  For a reaction to be spontaneous ∆G must be -ve .

Q: A small dish containing 530 g of water isplaced outside for the birds. During the night the outside…

A: A small dish containing 510 g of water is placed outside for the bird. Surroundings absorb the heat…

Q: Define Spontaneous and Nonspontaneous Processes?

A: Spontaneous Process:  The process which can take place by itself or by initiation independent of the…

Q: Which substance has the higher entropy?(a) dry ice (solid CO2) at −78 °C or CO2(g) at 0 °C(b) liquid…

A: The substance which has higher entropy has to be predicted.

Q: Which of the following relationships is true under reaction conditions of constant pressure &…

A: A) A negative free energy change represents spontaneous process. hence option A is false.   B) A…

Q: 2 (g) + 3H2 (g)  2NH3 (g) ΔrS = - 201 J K−1mol−1 ΔrH = - 99.3 kJ mol-1 a)    Calculate the ΔrG…

A: The balanced equation is: N2(g) + 3H2(g) ⇌ 2NH3(g)  ∆rS = - 201 J.mol-1.K-1 or - 0.201 kJ.mol-1.K-1…

Q: Which of the following processes are spontaneous and which are nonspontaneous: lightning

A: Spontaneous process  is a process, which occurs on its own without external forces. They are…

Q: Which of the following reactions will NOT be spontaneous at any temperature?          (A) 2SO3(g)…

A: If Delta G is negative then reaction is spontaneous and if positive then reaction will never be…

Q: Suppose a reaction has DH > 0 and DS > 0; that is, both enthalpy and entropy changes have positive…

A: The Gibbs-Helmholtz equation is: ∆G = ∆H - T∆S.  If ∆G is negative then the reaction will be…

Q: Predict which substance has greater molar entropy. Explain.

A: (a).If the complexity of the molecule increases, them there is an increase in the entropy.In the…

Q: Describe how matter is redistributed when the following spontaneous processes take place:(a) A solid…

A: Sublimation:- It is the change in form of substance from solid state to gaseous state. Example-…

Q: For the reaction Co(g) + 3H2(g)– CH4(g) + H2O(g) AH° = -206.1 kJ and AS° = -214.7 J/K The standard…

A: In Part-A we will determine the ∆G° value and direction of Reaction.  But, in Part-B we will…

Q: If a reaction is exothermic and its entropy change is positive, which statement is true? (a) The…

A: A chemical reaction in which heat is liberated is called an exothermic reaction. For an exothermic…