From the following combinations of ΔH and ΔS, predict if a process will be spontaneous at...

From the following combinations of ΔH and ΔS, predict if a process will be spontaneous at a high or low temperature: (a) both ΔH and ΔS are negative, (b) ΔH is negative and ΔSis positive, (c) both ΔH and ΔS are positive, (d) ΔH is positive and ΔS is negative.

Expert Solution

queen_honey_blossom answered 2 years ago

A) It is determined that for a particular process, ΔH = +185 kJ and ΔS =...

A) It is determined that for a particular process, ΔH = +185 kJ and ΔS = +1.80 J/K. At what temperature (in kelvin) does the reaction become spontaneous? B)Which of the following statements are true for the reaction I2(g) → 2 I(g) I. ΔH is positive II. ΔH is negative III. ΔS is positive IV. ΔS is negative V. The reaction is spontaneous at any temperature C) For which of the following processes would ΔS° be expected to be most...

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

Which of the following processes are spontaneous? For each process also indicate whether ΔS, ΔSsurr,and ΔSuniv,...

Which of the following processes are spontaneous? For each process also indicate whether ΔS, ΔSsurr,and ΔSuniv, are positive, negative or zero: a. The freezing of supercooled liquid water at −3°C and 1 bar. b. The freezing of liquid water at 0°C and 1 bar by removing a small amount of heat. c. The adiabatic expansion of a van der Waals gas into a vacuum. d. The reversible isothermal compression of an ideal gas

1 For the process 2F(g)→F2(g), Select one: a. ΔH is + and ΔS is + for...

1 For the process 2F(g)→F2(g), Select one: a. ΔH is + and ΔS is + for the reaction.ΔH is + and ΔS is + for the reaction. b. ΔH is + and ΔS= 0 for the reaction.ΔH is + and ΔS= 0 for the reaction. c. ΔH is – and ΔS is – for the reaction.ΔH is – and ΔS is – for the reaction. d. ΔH is – and ΔS is + for the reaction.ΔH is – and ΔS ...

Given the values of ΔH∘rxn, ΔS∘rxn, and T below, determine ΔSuniv. Predict whether or not each...

Given the values of ΔH∘rxn, ΔS∘rxn, and T below, determine ΔSuniv. Predict whether or not each reaction will be spontaneous. ΔH∘rxn=− 118 kJ , ΔS∘rxn= 261 J/K , T= 294 K ΔSuniv = ??? (J/K) ΔH∘rxn= 118 kJ , ΔS∘rxn=− 261 J/K , T= 294 K . ΔSuniv = ??? (J/K) ΔH∘rxn=− 118 kJ , ΔS∘rxn=− 261 J/K , T= 294 K . ΔSuniv = ??? (J/K) ΔH∘rxn=− 118 kJ , ΔS∘rxn=− 261 J/K , T= 565 K . ΔSuniv...

Classify the following phase changes by the signs of the system's ΔH and ΔS.

Given the values of ΔH∘rxn, ΔS∘rxn, and Tbelow, determine ΔSuniv. A. ΔH∘rxn=− 118 kJ , ΔS∘rxn=...

Given the values of ΔH∘rxn, ΔS∘rxn, and Tbelow, determine ΔSuniv. A. ΔH∘rxn=− 118 kJ , ΔS∘rxn= 258 J/K , T= 294 K B. ΔH∘rxn= 118 kJ , ΔS∘rxn=− 258 J/K , T= 294 K C. ΔH∘rxn=− 118 kJ , ΔS∘rxn=− 258 J/K , T= 294 K . D. ΔH∘rxn=− 118 kJ , ΔS∘rxn=− 258 J/K , T= 545 K . Predict whether or not the reaction in part A will be spontaneous. Predict whether or not the reaction in part...

Calculate the value of ΔG°, ΔH°, & ΔS° for the formation of phosphorous trichloride from its...

Calculate the value of ΔG°, ΔH°, & ΔS° for the formation of phosphorous trichloride from its constituent elements at 25°C. P2 (g) + 3Cl2 (g) → 2PCl3 (g) is ________ kJ/mol.

Given the values of ΔH∘rxn , ΔS∘rxn , and T below, determine ΔSuniv . a) ΔH∘rxn=...

Given the values of ΔH∘rxn , ΔS∘rxn , and T below, determine ΔSuniv . a) ΔH∘rxn= 87 kJ , ΔSrxn= 146 J/K , T= 296 K Will this be spontaneous or not spontaneous? b) ΔH∘rxn= 87 kJ , ΔSrxn= 146 J/K , T= 762 K Will this be spontaeous or not spontaneous? c) ΔH∘rxn= 87 kJ , ΔSrxn=− 146 J/K , T= 296 K will this be spontaneous or not spontaneous? d) ΔH∘rxn=− 87 kJ , ΔSrxn= 146 J/K ,...

What are the values of q, w, ΔU, ΔH, ΔS, ΔSsurr, and ΔSuniv for the following constant...

What are the values of q, w, ΔU, ΔH, ΔS, ΔSsurr, and ΔSuniv for the following constant pressure process for a system containing 0.137 moles of CH3OH ? CH3OH(g, 122.0 ºC, 1.00 atm) ⟶ CH3OH(l, 29.0 ºC, 1.00 atm) Assume that CH3OH(g) behaves as an ideal gas and the volume of CH3OH(l) is much less than that of CH3OH(g). Also, assume that the temperature of the surroundings is 29.0 ºC. Data: Molar heat capacity for CH3OH(g), Cp,m = 44.1 J K−1 mol−1 Molar...

Question