38. Based on the AHand AS values for a given chemical reaction, it is possible to predict whether the reaction is spontaneous or not at various temperatures. Which one of the following statements has the most correct answers? (A) If AH and AS are both positive, the reaction will always be spontaneous (B) If AH and AS are both positive, the reaction will be spontaneous at a high enough temperature (C) If AH is negative and AS is positive, the reaction will always be spontaneous (D) If AH and AS are both negative, the reaction will always be spontaneous (E) Both (B) and (C)

38. Based on the AHand AS values for a given chemical reaction, it is possible to predict whether the reaction is spontaneous or not at various temperatures. Which one of the following statements has the most correct answers? (A) If AH and AS are both positive, the reaction will always be spontaneous (B) If AH and AS are both positive, the reaction will be spontaneous at a high enough temperature (C) If AH is negative and AS is positive, the reaction will always be spontaneous (D) If AH and AS are both negative, the reaction will always be spontaneous (E) Both (B) and (C)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

for the following reaction: (Given: AH = -176 KJ and AS = -284.5 J/K). at 30 Celsius NH3(g) + HCI(g) ---> NH4CI(s) Calculate AG, is the reaction spontaneous or non-spontaneous. +89.796 kJ , spontaneous +89.796 kJ , non spontaneous -89.796 kJ , non spontaneous -89.796 kJ , spontaneous
Without doing any calculations, determine the sign of AS, for each chemical reaction. a. 2 KCIO,(s) 2 KCI(s) + 30(g) b. CH=CH;(g) + H2() CH,CH,(8) c. Na(s) + 1/2 C;(g) d. N(g) + 3 H(K) NaCI(s) 2 NH,(8)
If a reaction is exothermic and its entropy change is positive, which statement is true? (a) The reaction is spontaneous at all temperatures (b) The reaction is nonspontaneous at all temperatures (c) The reaction is spontaneous only at higher temperatures (d) The reaction is spontaneous only at lower temperatures
Without doing any calculations, determine the sign of AS and ASu for each chemical reaction. In addition, predict under what temperatures (all temperatures, low temperatures, or high temperatures), if any, the reaction is spontaneous. a. 2 CO(g) + O2(g) 2 CO,(g) AHn = -566.0 kJ b. 2 NO,(g) 2 NO(g) + O,(g) AHan = +113.1 kJ c. 2 H,(g) + 0,(g) 2 H,0(g) d. CO,(g) - C(s) + O2(g) AHn = -483.6 kJ AHsn = +393.5 kJ Exn
calculate ΔS rxn (standrad entropy) and Δ Ssurr for the reactions and determine if each is spontaneous at 25 degrees celsius.
Calculate AG for the following reaction at 25°C. Will the reaction occur (be spontaneous)? How do you know? NH(g) + HCI(g) ? NH4CI(s) Also given for this reaction AH =-176.0 kJ AS = -284.8 J-K'
Be sure to answer all parts. For the gaseous reaction of carbon monoxide and chlorine to form phosgene (COCl₂), perform the following calculations. (a) Calculate the AS at 298 K (AH° = −220. kJ/mol and AG° = −206 kJ/mol). kJ/mol K (b) Assuming that AS and AH change little with temperature, calculate AG at 450. K. kJ/mol
9) For which set of values of AH and AS will a reaction be non-spontaneous at 25°C? a) AH• = -10 kJ, AS = - 15 J b) AH• = - 10 kJ, AS= +5 J c) AH° = + 5 kJ, AS = +8J
What factors must you consider to determine the sign of AS for the reaction 2N₂O(g) → 2N₂(g) + O₂(g) if it occurs at constant temperature? Select all that apply.. DODSEDO (a) the number of moles of products versus reactants: in this case the number of moles increases (b) the number of moles of products versus reactants: in this case the number of moles decreases (c) the state of the products versus reactants (d) the complexity of the molecules: N₂O is more complex than either N₂ or O₂ (e) the complexity of the molecules: N₂O is less complex than either N₂ or O₂ (f) the total number of valence electrons: N₂O has more valence electrons than N₂ and O₂ (g) the total number of valence electrons: N₂O has less valence electrons than N₂ and O₂ AS is expected to be
Give typed full explanation
14) Predict the sign of AS for each process. A) H20G) → H2O(1) B) Solid carbon dioxide sublimes C) 2 N20(g) → 2 N2g) + O2(g)
c) SO d) CO 0. Sodium reacts violently with water according to the equation: 2 Na(s) +2 H;0() 2 NaOH(aq) + H:(g) resulting solution has a higher temperature than the water prior to the addition of sodium. What are the signs of AH and AS for this reaction? a) AH is negative and AS is negative. b) AH is negative and AS is positive. e) AH is positive and AS is negative. d) AH is positive and AS is positive. (END)