The combination that always gives a spontaneous process is __. a) +ΔH                       +ΔS b) +ΔH                       -ΔS c) -ΔH                        +ΔS d) -ΔH                        -ΔS e) +/-ΔH                    +ΔS

Q: Consider the reaction below at constant pressure. Use the information provided to determine the…

A: If delta S surrounding is positive then reaction will be spontaneous.

Q: If enthalpy is +220 kJ for a reaction and entropy is +120 J, at what temperature is this…

A: The spontaniety of any reaction is decided by the Gibb's free energy change if the reaction. Any…

Q: For the following reaction (the detonation of nitroglycerin), is it spontaneous under standard…

A: Given that : We have to identify whether the reaction for the detonation of nitroglycerin is…

Q: Which of these reactions is expected to be spontaneous at all temperature?          (A

A: We have to tell which reactions is expected to be spontaneous at all temperature

Q: For a given reaction, the ΔS°rxn is 239.9 J/mol*K and the ΔG°rxn is -212.7 kJ/mol at 298 K. What is…

A: In the given question we have to calculate the change in free energy at 580 K , assuming that…

Q: Rank the following substances in order of increasing standard molar entropy. (Please use the numbers…

A: Here, we have to rank the given substances in order of increasing standard molar entropy (S°). Given…

Q: Photochemical smog is formed through a sequence of reactions, the first of which is N2(g) + O2(g) ⟶…

A: For a reaction to be spontaneous ,    should be negative Hence  value of should be greater than ,

Q: At what temperature (K) does a reaction becomes spontaneous when ΔS = -382 J/mol-K and ΔH = -182.7…

A: ΔG = ΔH - TΔS For a reaction to be spontaneous: ΔG = -ve

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: If a reaction occurs very slowly and is endothermic then it cannot be spontaneous. True or false?

A: Spontanious reaction means the ability of the reaction to procede to right right i.e. towards the…

Q: For the reaction Na₂CO3 + 2HCl-NaCl + CO₂ + H₂O ΔH is -144.1 kJ. What is ΔU

A:

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

A: The condition of spontaneity of a reaction is that overall change in Gibbs free energy should be…

Q: * :The concentration of ( mgO) in bone is a-10.2 b-0.2 c-0.3 d-4 :We can write law the work as…

A:

Q: Consider this reaction: N2 (s) + 2 02 (g)→ 2NO2 (g) AS° = -121.77 J/K.mol; AH° = %3! 66.36 kJ/mol…

A: From the given question it is given that, ΔSo < 0 ΔH0 > 0

Q: 10) Show that it is a spontaneous process for water to boil at 110 °C.

A: When we superheat liquid water at 110°C, the nature of the reaction can be stated by following it's…

Q: Which of the following changes will always be true for a spontaneous reaction?  +ΔG  –ΔG  +ΔS…

A: The spontaneous reaction means the reaction which occur without intervenation at given set of…

Q: Calculate the temperature (K) at which a reaction becomes spontaneous when ΔS = 771 J/mol-K and ΔH =…

A:

Q: The reaction Q(g) + R(g) → Z(l) is shown to be exothermic. Which of the following is true concerning…

A: Interpretation: We have to discuss if the reaction is exothermic , in that case which condition from…

Q: A reaction has the following thermochemical values at 272.15 K: ΔH = -189.3 kJ mol-1 ΔS = -166.0 J…

A: Given-> Temperature (T) = 272.15 K ∆H = -189.3 kJ.mole-1 = -189300 J.mole-1(1KJ=1000J) ∆S =…

Q: Considering water as the system, what are the signs(+/-) of enthalpy, entropy, and Gibb's free…

A:

Q: reaction has the following thermochemical values at 273.15 K: ΔH = -184.8 kJ mol-1 ΔS = -166.6 J…

A: Given,  ΔH = -184.8 kJ mol-1 ΔS = -166.6 J mol-1K-1 Temperature = 273.15 K

Q: 2) Consider the following reaction at constant pressure. Use the information here to determine the…

A: The objective of the question is to determine the value of ​ and whether the reaction is spontaneous…

Q: A reaction produces a value for ΔSuniv of -2,700 J/K at 295 K.     spontaneous…

A: Thermodynamics is the branch of chemistry which deals with the study of heat and other forms of…

Q: For a particular reaction, AH° = -28.4 kJ and AS = -87.9 J/K. Assuming these values change very…

A: Given,  ∆H° = - 24 kJ = - 2400 J  ∆S° = - 87.9 J/K

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: In a typical cold pack (used for sports injuries), a salt such as ammonium nitrate is kept in a…

A: Dissolution of ammonium nitrate in water is given by, NH4NO3(s)→H2O(l) NH4+(aq)+NO3-(aq)   ∆H=+25.09…

Q: For a reaction, Delta H = -145 kJ and Delta S = 220 J. Is the reaction spontaneous? O Always O At…

A: We know ; ∆G = ∆H - T∆S When the Value of ∆G is negative , then the Reaction is spontaneous . &…

Q: ΔGo

A:

Q: The boiling point of carbon disulfide is 46.3oC at 1.0 atm, and its enthalpy of vaporization is…

A:

Q: It is determined that a particular chemical reaction has ΔHorxn = -115 kJ and ΔSorxn = -263 J K-1.…

A: This question belongs to Chemical Thermodynamics. Given that  ΔHorxn = -115 kJ = -115000J and ΔSorxn…

Q: In a spontaneous process, the entropy of the system always increases. True or False

A: The overall spontaneity of the reaction is determined by the Gibbs free energy change, (∆G) If the…

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: Classify the possible combinations of signs for a reaction's Δ? and Δ⁢S values by the resulting…

A: If ΔH is negative and ΔS is positive, the reaction is spontaneous. When ΔS < 0 and ΔH > 0, the…

Q: A reaction has the following thermochemical values at 283.15 K: ΔH = -183.3 kJ mol-1 ΔS = -160.6 J…

A:

Q: 2. Write the balanced chemical equation for the combustion of benzene, C6H60, to give carbon dioxide…

A:

Q: Calculate AGo for a reaction for which AH° = 24.6 kJ and AS° = 132 J/K at 298 K. Is this reaction…

A: Answer: option c) -14.7 kJ ; spontaneous

Q: For the reaction 2CO(g) + O2(g)2CO2(g) ΔG° = -515.1 kJ and ΔS° = -173.1 J/K at 294 K and 1 atm.…

A: Given data,∆G=-515.1kJ∆S=-173.1J/Kmoles=1.66

Q: Which reaction below is spontaneous at low temperatures and nonspontaneous at high temperatures? O…

A:

Q: The enthalpy of vaporization of ammonia is 23.35 kJ/mol at its boiling point (–33.4°C). Calculate…

A: Given: Enthalpy of vaporization of ammonia = 23.35 kJ/mol. Boiling point of ammonia = -33.4 oC And…

Q: For the reaction H2(g) + C2H4(g)C2H6(g) ΔG° = -96.0 kJ and ΔS° = -120.7 J/K at 340 K and 1 atm.…

A: The Gibbs free energy gives the maximum amount of work that could be done by this reaction. It can…

Q: 2H2O(g) ----> 2H2(g) + O2(g) The reaction above is only spontaneous at temperatures above 2000K.…

A: The spontaneous nature of a system can also be predicted by the Gibbs free energy change of the…