Predict whether AS will be positive or negative for reactions (a) and (b): a. 2 HgO(s)...
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...
6. (3 points) For each of the following reactions, predict the sign (positive or negative) for the AS and AH values. Then determine when the reaction will be spontaneous (always, never, at high temperatures, or at low temperatures). a. CH4(g) + 202 (g) → CO2 (g) + 2H20 (g) b. 4H3PO4(s) - P010 (s) + 6H20 (1) c. HCI (g) + NH3(g) → NH4Cl (s)
Hi! Can someone solve this and explain it? 4. (10 pts) With time, urine starts to smell bad because of the following reaction: CO(NH2)2(aq) + H2O(l) → CO2(g) + NH3(aq) AH = ? a) Use the heats of formation in the table below to calculate AH for the reaction above Substance AH®, kJ mol' CO(NH2)2(aq) -319.2 CO2(aq) -412.9 CO2(g) -393.5 H2O(g) -241.8 H2O(1) -285.8 NH(aq) -80.3 NH3(g) b) Is the reaction exothermic or endothermic?
Which of the following would be true for a reaction that has a positive AS and a positive AH? Select one: a. It is not possible to determine without more information. b. This reaction will be nonspontaneous only at high temperatures. c. This reaction will be spontaneous only at high temperatures. d. This reaction will be spontaneous at all temperatures. e. This reaction will be nonspontaneous at all temperatures. You prepared a galvanic cell using Pb(s) | Pb+2(aq) || Hg'...
For which reaction will Kp = Kc? ONiCO3(s) = NiO(s) + CO2(g) O 2 HgO(s) = Hg(1) + O2(8) OS(s) + O2(8) =SO2(g) K2CO3(s) =K20(s) + CO2(g) O 2 H2O(1) = 2 H2(g) + O2(g)
3. Predict the sign (positive or negative) on the entropy change for each of these reactions. (a) 2 SO2 (g) + O2 (g) → 2 SO3 (g) Negative (b) 2 NH3 (g) → N2 (g) + 3 H2 (g) (c) CO (g) + 2 H2 (g) → CH3OH (1) 4. For the reaction: 2NO2 (g) + N204 (g) at 298 K, The value of AH° and AS™ are -58.03 kJ and -176.6J/K, respectively. (a) What is the value of AG°...
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...
Chapter 18 Thermodynamics Homework 1.Predict the sign of AS for each process: a) The boiling of water b)2HgO(s)-2Hg(I) + 02(s) c) CaCO, (s)CaO(s)+ CO (g) 2. Is the following process spontaneous or nonspontaneous at a given temperature? NaNO,(s) ->NaNO,(aq) 3. If a reaction has ΔS < 0 and ΔΗ < 0 will the reaction always be spontaneous, spontaneous at low T, spontaneous at high T, or never spontaneous? 4.Consider this reaction: Calculate ΔG at 25 °C and determine whether the...
16. For the following reactions, predict whether they will tend to be spontaneous at either high or low temperatures, or at all temperatures, or at no temperature (10.0 points) a) H2(g) + 12(g) → 2HI(g) AH = -220 kJ b) 3S2(g) → 253(g) AH = +227 kJ c) H2O(l) → H2O(g) AH = +44 kJ d) H2(g) + '/gS8(g) → H2S(1) AH = -247 kJ