For a given reaction, ΔH = +20.8 kJ and ΔS = +27.6 J/K. The reaction is spontaneous __________
A) At T < 754 K |
B) | At T > 133 K |
C) | At all temperatures |
D) | At T > 754 K |
E) | At T < 133 K |
For a given reaction, ΔH = +20.8 kJ and ΔS = +27.6 J/K. The reaction is...
A reaction has a ΔH°= 204.6 kJ and a ΔS°= -19.5 J/K. a. Given the sign and magnitude of ΔH and ΔS, will the reaction be spontaneous at all temperatures, nonspontaneous at all temperatures? Briefly explain your reasoning. b. Calculate the standard free energy change for the reaction at 298 K. c. Is the reaction spontaneous or nonspontaneous at 298 K?
Consider a reaction for which ΔH = 6.03 kJ/mol; ΔS = 22.1 J/K-mol. Which of the following statements is true? a. The reaction becomes spontaneous at high temperatures above 273 K b. The reaction becomes spontaneous at low temperatures below 273 K c. The reaction is spontaneous at all temperatures d. The reaction is never spontaneous
For the reaction ΔH°=+61.14 kJ and ΔS° = +132 J/K at 25°C. At what For the reaction ΔH°=+61.14 kJ and ΔS° = +132 J/K at 25°C. At what minimum temperature will the reaction be spontaneous?minimum temperature will the reaction be spontaneous? Select one: a. 479 K b. 500 K c. 463 K d. 571 K e. 2904 K
Part A: ΔH∘rxn= 121 kJ ; ΔS∘rxn=− 246 J/K ; T= 291 K Express your answer as an integer. Part B: ΔH∘rxn=− 121 kJ ; ΔS∘rxn= 246 J/K ; T= 291 K Express your answer as an integer. Part C: ΔH∘rxn=− 121 kJ ; ΔS∘rxn=− 246 J/K ; T= 291 K Express your answer as an integer. Part D: ΔH∘rxn=− 121 kJ ; ΔS∘rxn=− 246 J/K ; T= 600 K Express your answer as an integer. Part E: Predict whether...
Given the values of ΔH∘rxn, ΔS∘rxn, and T, determine ΔSuniv. Part A ΔH∘rxn=+84 kJ , ΔSrxn=+141 J/K , T= 308 K Express your answer as an integer. Part B ΔH∘rxn=+84 kJ , ΔSrxn=+141 J/K , T= 754 K Express your answer as an integer. Part C ΔH∘rxn=+84 kJ , ΔSrxn=− 141 J/K , T= 308 K Express your answer as an integer. Part D ΔH∘rxn=− 84 kJ , ΔSrxn=+ 141 J/K , T= 403 K Express your answer as an...
Given the values of ΔH∘rxn, ΔS∘rxn, and T below, determine ΔSuniv. Part A: ΔH∘rxn=− 89 kJ , ΔSrxn=− 144 J/K , T= 306 K. Express your answer using two significant figures. Part B: ΔH∘rxn=− 89 kJ , ΔSrxn=− 144 J/K , T= 756 K. Express your answer using one significant figure. Part C: ΔH∘rxn=+ 89 kJ , ΔSrxn=− 144 J/K , T= 306 K. Express your answer using two significant figures. Part D: ΔH∘rxn=− 89 kJ , ΔSrxn=+ 144 J/K...
For a reaction, ΔH = – 249 kJ and ΔS = – 278 J/K. What is the maximum temperature at which the reaction is spontaneous?
A certain reaction has ΔH°= -19.5 kJ/mol and ΔS°= +42.7 J/mol K a) Is the reaction exothermic or endothermic? b) Does the reaction lead to an increase or decrease in the disorder of the system? c) Calculate ΔG° for the reaction at 298K. d) Is the reaction spontaneous at 298 K under standard conditions?
For a particular reaction, ΔH = -32 kJ and ΔS =-98 J/K. Assume that ΔH and ΔS do not vary withtemperature. A) At what temperature will the reaction have ΔG= 0? B) If T is increased from that in part A, will the reaction bespontaneous or nonspontaneous?
For a particular reaction, ΔH° is -28.4 kJ and ΔS is -87.9 J/K. Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction?