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 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: 1) Which of the following statements is TRUE? A) ASuniverse is always greater than zero for a…

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A:

Q: Consider entropy and its role in determining if chemical and physcial processes are spontaneous.  a)…

A: Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and…

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A:

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: 2) Consider the following information AH = -40.5 kJ; AS = 342.1 J/K 40°C A+B→C (a) Just by looking…

A: ΔG ΔH ΔS Spontaneous at all temperature - + Spontaneous at low temperature - -…

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

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

A: Chemical reaction:

Q: Spontaneous reactions are the reactions that  occur on its own, without the use of any external…

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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: 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: 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: 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…

Q: 23. When a liquid changes to a gas, the entropy of the system (a) increases. (b) decreases. (c)…

A: Entropy denotes the randomness or disarrangement of particles