Testbank, Question 033
Does a reaction with a ΔH of 20 kJ/mol and a ΔS of 10 J/mol·K at 298 K favor reactants or products?

Testbank, Question 033 Does a reaction with a ΔH of 20 kJ/mol and a ΔS of...
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?
Given the values of ΔH∘rxn, ΔS∘rxn, and T , determine ΔSuniv: A) ΔH∘rxn=− 124 kJ , ΔS∘rxn= 258 J/K , T= 298 K B) ΔH∘rxn= 124 kJ , ΔS∘rxn=− 258 J/K , T= 298 K C)ΔH∘rxn=− 124 kJ , ΔS∘rxn=− 258 J/K , T= 298 K D) H∘rxn=− 124 kJ , ΔS∘rxn=− 258 J/K , T= 554 K
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 the following reaction at 298 K. C(graphite)+2H2(g)⟶CH4(g)ΔH∘=−74.6 kJ and ΔS∘=−80.8 J/KC(graphite)+2H2(g)⟶CH4(g)ΔH∘=−74.6 kJ and ΔS∘=−80.8 J/K Calculate the following quantities. ΔSsys=ΔSsys J/K ΔSsurr= J/K ΔSuniv= J/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 Cl2O(g) + 3/2O2(g) → 2ClO2(g) ΔH° = 126.4 kJ/mol and ΔS° = -74.9 J/K mol. At 381°C, what is ΔG?
A) If ΔH = -70.0 kJ and ΔS = -0.400 kJ/K , the reaction is spontaneous below a certain temperature. Calculate that temperature. Express your answer numerically in kelvins. B) Glacial acetic acid is the concentrated form of acetic acid, the acid in vinegar. The term "glacial" refers to the appearance of the solid form, which resembles ice-like crystals. What is the melting point of this compound, in degrees Celsius, based on its thermodynamic data shown here? ΔHfus (kJ/mol) ΔSfus...
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 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
1. Consider a process at 286 K with ΔH = -72.5 kJ/mol and ΔS = -96.8 J/K mol Which of the following is true? ΔG = -44.8 kJ/mol and the process will not be spontaneous ΔG = +39.4 kJ/mol and the process will be spontaneous ΔG = -44.8 kJ/mol and the process will be spontaneous ΔG = -19.1 kJ/mol and the process will not be spontaneous ΔG = +39.4 kJ/mol and the process will not be spontaneous 2. Consider a...