questions 3,4,5 TICLE complete the following sentence. The vapor A) spontaneous at low temperature and nonspontane...
questions 3,4,5 TICLE complete the following sentence. The vapor A) spontaneous at low temperature and nonspontane B) nonspontaneous at all temperatures honspontaneous at low temperature and spontaneous at high temperature D) spontaneous at all temperatures E) not enough information given to draw a conclusion 3) Given the following reaction at equilibrium, if Kp = 1.20 at 250.0°C, KC PC13 (8) + Cl2 (g) PCI (8) A) 429 B) 2.79 x 10-2 51.5 D) 1.20 E) 3.90 x 10-6 4) All...
Although the reaction below is spontaneous, it does not proceed at a measurable rate at low temperatures. Which statement(s) can account for this? 3 H2 (g) + N2 (g) → 2 NH3 (g) 1. The frequency of collisions at low temperatures is reduced. 2. The activation energy at low temperatures is reduced. 3. The average energy of collisions at low temperatures is reduced. a. 1 and 3 only b. 1 only c. 1 and 2 only d. 2 and 3...
8. For the following reaction, CC2(s) + 2H2O(l) + Ca(OH)2(s) + C2H2(g) which is spontaneous at all temperatures, one would predict that a. AG is positive for all temperatures. d. AH is - and AS is for the reaction. b. AH is + and AS is for the reaction. e. AH is + and AS' is- for the reaction. c. AH is - and AS is for the reaction. 9. Calculate the standard absolute entropy, in J/mol K. of Mg:...
14. For the following reactions, predict whether they will tend to be spontaneous at high, low, all temperatures, or non-spontaneous at any temperature (10 points) a) An "instant ice-pack" type of reaction where AS > 0, and AH > 0 b) 3A (1) ► B(s) + C(1) + D(g), AH < 0 c) 2A(s) → B(g) + C(1), AH > 0
Page ECT Or Temperature < 7 > AVM of 13 0 1. Match the statements below to one of the reactions. Supply the reaction number. Number Reaction 1 SOC12(C) + H2O(C) SO2(g) + 2 HCl(8) 2 CH4(8) + 2 Cl2(g) → CH2Cl2(g) + 2 HCl(g) HgO(S) Hg() + 102(g) I2(g) → Iz(s) 2 HI(g) + H2(g) + 12(S) + + a. This reaction is spontaneous at low temperatures, but becomes nonspontaneous at higher temperatures. b. This reaction is neither enthalpy...
4. Which of the following is consistent with a spontaneous endothermic reaction? (A) AH> 0, AS <0, AG <0 (D) AH<0, AS > 0, AG>O (B) AH > 0, AS > 0, AG <0 (E) AH>0, AS <0, AG>0 (C) AH<0, AS <0, AG<0 5. For the reaction H, (g) +S (8) HS (g), AF- -20.2 kJ/mol and AS = +43.1 J/K mol. Which of these statements is true? (A) The reaction is only spontaneous at low temperatures. (B) The...
Thermodynamics Practice Problems 1. Predict the sign of AS.(positive or negative) for the following reactions a 2 Mg(s) +,(@) 2 Mgo (s) AS b. CH206(s) → 2C,H,OH(I) + 2003(g) AS c. 2 NH3(g) + CO2(g) → H2O(l) + NH CONH3(aq) AS d. Cu(s) (at 100°C) → Cu(s) (at 25°C) AS 2. Which two variables can indicate if a reaction is spontaneous or not? 3. The second law of thermodynamics tells us that: a Energy is conserved. b. The entropy of...