The most appropriate response for a reaction that is spontaneous at all temperatures would be (a)...

The most appropriate response for a reaction that is spontaneous at all temperatures would be

(a) ΔHº = - ΔSº = +

(b) ΔHº = + ΔSº = -

(c) ΔHº = - ΔSº = -

(d) ΔHº = + ΔSº = +

Expert Solution

Answer: (a)

A reaction will be spontaneous when it has a negetive free energy value. The change in free energy will have always negetive value when the reaction is exothermic (change in enthalpy, = negetive) with more disorder (change in entropy, = positive). This can be explained with the help of following equation.

The change in spontaneous nature of reaction with change in enthalpy and entropy is given below,

queen_honey_blossom answered 2 years ago

True or False for the following questions...... 1) The following reaction is spontaneous at all temperatures....

True or False for the following questions...... 1) The following reaction is spontaneous at all temperatures. 2NO2(g) --> N2(g) + 2O2(g) ∆H = -123 kJ 2) The following reaction is spontaneous at all temperatures. 3O2(g) --> 2O3(g) ∆H = +423 kJ 3) If the following reaction takes place at 300 K, the reaction is spontaneous at 300 K. N2(g) + 3H2(g) --> 2NH3(g) ∆H = -90 kJ ∆S for N2(g) = 192 J/molK; ∆S for H2(g) = 131 J/molK; ∆S for...

Which of the following reactions would you predict to be spontaneous at all temperatures (assuming ΔH°rxn...

Which of the following reactions would you predict to be spontaneous at all temperatures (assuming ΔH°rxn does not change significantly with temperature)? H2S(g) + 2O2(g) → H2SO4(l) ΔH°rxn = –793 kJ/mol 2Ag(s) + 3N2(g) → 2AgN3(s) ΔH°rxn = +1240 kJ/mol C6H6(l) + 3H2(g) → C6H12(l) ΔH°rxn = –207 kJ/mol Na2CO3(s) + 2HCl(aq) → 2NaCl(aq) + H2O(l) + CO2(g) ΔH°rxn = –834 kJ/mol CaCO3(s) → CaO(s) + O2(g) ΔH°rxn = +179 kJ/mol

What is the condition for a reaction to be spontaneous? If a reaction is spontaneous at...

What is the condition for a reaction to be spontaneous? If a reaction is spontaneous at one temperature is it spontaneous under all conditions? [10 marks] ii) Given the following information ?fH°(CH3OH(g)) = -201.0 kJ mol-1 / S°(CH3OH(g)) = 239.70 J mol-1 K-1 ?fH°(CH2O(g)) = -108.6 kJ mol-1 / S°(CH2O(g)) = 218.95 J mol-1 K-1 ?fH°(H2(g)) = 0 / S°(H2(g)) = 130.70 J mol-1 K-1 determine ?rH°, ?rS° and ?rG° for the formation of formaldehyde from the dehydrogenation of methanol...

How would you know if a reaction is spontaneous based on the enthalpy change

Which reaction(s) would be spontaneous as written? (select all that apply) -2Fe3+(aq) + 3Cu(s) →→ 2Fe(s)...

Which reaction(s) would be spontaneous as written? (select all that apply) -2Fe3+(aq) + 3Cu(s) →→ 2Fe(s) + 3Cu2+(aq) -3Cu2+(aq) + 2Fe(s) ⟶⟶3Cu(s) + 2Fe3+(aq) -2Fe3+(aq) + Cu(s) →→ 2Fe2+(aq) + Cu2+(aq) -Cu2+(aq) + 2Fe2+(aq) →→ Cu(s) +2Fe3+(aq)

Answer ALL parts. (a) The reaction B + C → D just becomes spontaneous at a...

Answer ALL parts. (a) The reaction B + C → D just becomes spontaneous at a temperature of 78.1 °C. When the temperature is increased to 220 °C: (i) Calculate Gibbs free energy (ii) Calculate equilibrium constant (iii) State whether the products or reactants are favoured at this temperature and explain your reasoning (iv) State the assumptions associated with your calculations. Useful data for this question: ΔSreaction (B + C → D) = 259.4 J K–1 mol–

1. What minimum concentration of Sn2+ would be necessary to make the following reaction spontaneous at...

1. What minimum concentration of Sn2+ would be necessary to make the following reaction spontaneous at 25°C if [Pb2+] = 1.0 M? Pb(s) + Sn2+(aq) → Pb2+(aq) + Sn(s) 1.1 M 0.46 M 2.2 M 1.5 M 0.68 M 2. A spoon was silver-plated electrolytically in a AgNO3 solution. If 0.750 g of Ag was deposited on the spoon at a constant current of 20.0 mA, how long (in hours) did the electrolysis take? (1 mA = 1x10–3 A) 5.92...

Are all public services essential? Based on your answer, what would be the most appropriate dispute...

Are all public services essential? Based on your answer, what would be the most appropriate dispute resolution procedures for people in the following occupations: firefighting and maintenance

Describe all the phase changes that would occur and estimate the temperatures at which they would...

Describe all the phase changes that would occur and estimate the temperatures at which they would occur when CO2 is heated from -80 degrees celsius to -20 degrees celsius at a constant pressure of 3 atm; and then 6 atm

Matching. Place the letter indicating the most appropriate response next to the number of the question....

Matching. Place the letter indicating the most appropriate response next to the number of the question. A. Peasants B. Zealots C. Pharisees D. Sadducees E. Essenes F. All (A, B, C, D, and E) _ _ 1. They were rabbis who taught prayer and study in synagogues as an alternative to sacrificial methods for honoring the God of Judaism. _ _ 2. They were an apocalyptic sect who expected and prepared for a cosmic battle between the...

Question