CCl4 (l)  <- ->  CCl4 (g)      At what temperature does the phase change become spontaneous?  (Give in K and in ℃).

Q: What is the entropy change for the universe, delta Suniv, for the vaporization of one mole of CH3OH…

A: The solution is as follows :

Q: What is the standard Gibbs free energy of formation, AGE, of NH3(g) at 298 K? Substance AHE (kJ/mol)…

A:

Q: a) Calculate AGxn for the reaction (AHrxn=572 kJ; ASrxn° = 179 J/K).

A: We know ∆Gorxn = ∆Hrxno - T∆Srxno . For a reaction to be spontaneous ∆G should be -ve . At…

Q: 14) Consider the sublimation of carbon dioxide (dry ice) is spontaneous under standard conditions.…

A: Given reaction is :  CO2 (s) &lt;-----------&gt; CO2 (g) , ∆G0rxn = -18.7 KJ/mole or -18700 J/mole…

Q: Consider the following reaction: 2 NO(g)  N2(g) + O2(g) The enthalpy change at 298 K for this…

A: The given equilibrium reaction is  2 NO(g) ----------&gt;  N2(g) + O2(g) The enthalpy change at 298…

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: Consider the reaction at 298 K: 2 NO(g) + O2(g)¡2 NO2(g) ΔG°rxn = -71.2 kJCalculate ΔGrxn under…

A: The equation for Gibbs free energy of a reaction is given below,…

Q: Consider the reaction:  H2S(g)+SO2(g)---> 3S(g)+2H2O(l) for which delta H is -233 kJ and delta S…

A: Given:

Q: Given the following table of thermodynamic data,   Substance ΔH∘f(kJ/mol)   S∘(J/mol⋅K)   H2(g)…

A: The "spontaneous reactions" always favor "forward reactions" where more product gets yielded and…

Q: Above what temperature (in ºC) does the reaction with H' of 192 kJ/mol and S’ of 622 J/mol·K become…

A:

Q: A 2.5 L cylindrical tank at 1 atm contains a 15.0 g mass of gaseous propyl alcohol (assume ideal gas…

A: We have to calculate entropy change of First process i.e for gaseous propyl alcohol. Given : 1 atm =…

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: For the reaction, A + B --> C, AHO = +30 kJ; AS° = +50 J/K. Therefore the reaction is: spontaneous…

A: For the reaction:  For a spontaneous reaction,

Q: For the reaction CaO(s) + CO2(g)CACO3(s) at 298 K, AG = -130.9 kJ/mol, AH= -178.3 kJ/mol, AS = -159…

A: For spontaneous reaction, value of  ΔG is negative. For non- spontaneous reaction,  value of ΔG is…

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: Consider the reaction 2 NO2(g)  N2O4(g) . (a) Using Gf N2O4(g) = 97.79 kJ/mol and Gf NO2(g) = 51.3…

A:

Q: Calculate the entropy change when 2 moles of NH3(l) at -40 ºC are converted into NH3 (g) at 200 ºC…

A: Entropy: Entropy is defined state of randomness or disorderness in a system Entropy of vaporization:…

Q: The enthalpy change for a certain reaction is -209.4 kJ and the entropy change is 585.7 J/K.  What…

A:

Q: If there are two chemical reactions: #1 with change in Gibbs free energy of -25 kJ/mol; and #2 with…

A: #2 since it has a higher change in Gibbs free energy.

Q: Change A chemical reaction between two liquids creates gaseous products. An exothermic chemical…

A: Spontaneity of the reaction can be decided on the basis of the value of Gibbs free energy change and…

Q: Indicate whether each statement is true or false. Most spontaneous processes are reversible.

A: Given Indicate whether each statement is true or false. Most spontaneous processes are reversible.

Q: Consider the reaction:  4 A (g) ------  2 B (s) +  3 C (g) + 20.5 kJ,    at what…

A:

Q: Does vaporization at lower temperature decrease entropy?

A: Entropy is nothing but it is measure of randomness.In…

Q: Cl₂ is a stable diatomic molecule. It can be decomposed to form two Cl atoms as shown here: Cl₂(g) →…

A: Answer:Here:

Q: 2NO(g) + O2(g)→ 2NO2(g); AH°= -125 kJ/mol; AS°= -150 J/mol-K Below a temperature of K, this reaction…

A:

Q: For a reaction for which AH = -142 kJ/mol and AS = -178 J/mol· K, which of the following statements…

A: If ∆G is negative, the process is spontaneous and may proceed in the forward direction. If ∆G is…

Q: Which of the following phase changes is not spontaneous at room temperature? Assume only the first…

A: Correct answer is (D) H₂O(g) → H₂O(s) At room temperature steam cannot convert into solid phase, so…

Q: Consider the reaction 2 NO2(g)  N2O4(g) . (a) Using Gf N2O4(g) = 97.79 kJ/mol and Gf NO2(g) = 51.3…

A:

Q: What is true about 02 (g) + 2HCl (g) AHY-48 kJ mol i. The reaction is non-spontaneous. ii. The…

A: Option i is correct.This is due to the fact that  negative ∆G  results in an spontaneous…

Q: Find the temperature at which K = 42.0 for the reaction H₂(g) + I2(g) 2HI(g). [Given: at 25°C, for…

A: We will first calculate ∆S° and ∆H° , then calculate temperature.

Q: 2. SO2(g) + O2(g), AH°25°C = +99.2 kJ and AS°25°C = +93.94 J/K. Is the reaction spontaneous at 25°C?…

A: The question is based on the concept of spontaneity of the reaction. if Gibbs free energy change of…

Q: For a particular reaction, AH = -46.7 kJ and AS =-123.8 J/K. Assuming these values change very…

A: ∆H°=-46.7KJ ∆S°=-123.8J/K ∆H°-T∆S°=0

Q: For the reaction 2NO(g) + O₂(g) → 2NO2(g), AH°=-113.1 kJ/mol and AS°= -145.3 J/K-mol. Under which…

A:

Q: .) Which of the following processes are spontaneous and which are nonspontaneous: (a) the ripening…

A: The following processes are spontaneous, and which are (a) the ripening of a banana, (b)…

Q: The enthalpy for a certain process is 146.4 kJ/mol and the entropy for the process is 463.6 J/K.  At…

A:

Q: 11) Why can endothermic reactions be spontaneous?

A: Introduction: Endothermic reaction: The reaction which requires heat to form the product is called…

Q: Which are spontaneous at all temperatures? Choose one or more: 2H,S(g) + 302(8) –→ 2H,0(g) + SO,(g)…

A: