Activity 3. Gibbs Free Energy (LAS 5.a) Learning Objective: Solve problems involving the standard Gibbs free energy. Substance AG° (kJ/mol) What you need: Pen, Paper, Periodic Table of Elements and Calculator. CH4 -50.8 What to do: Calculate the standard free-energy changes for the following eactions at 25°C and interpret the values obtained from the calculations. Write your answers in a separate sheet of paper. 02 CO2 -394.4 1. CHa(g) + 202(g) → CO2(g) + 2H2O(1) H20 -237.2 2. 2M9O(s) → 2Mg(s) + O2(g) Mgo -569.6 Mg

Activity 3. Gibbs Free Energy (LAS 5.a) Learning Objective: Solve problems involving the standard Gibbs free energy. Substance AG° (kJ/mol) What you need: Pen, Paper, Periodic Table of Elements and Calculator. CH4 -50.8 What to do: Calculate the standard free-energy changes for the following eactions at 25°C and interpret the values obtained from the calculations. Write your answers in a separate sheet of paper. 02 CO2 -394.4 1. CHa(g) + 202(g) → CO2(g) + 2H2O(1) H20 -237.2 2. 2M9O(s) → 2Mg(s) + O2(g) Mgo -569.6 Mg

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...

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Need part 4
MISSED THIS? Watch IWE: Standard Enthalpies of Formation; Read Section 7.9. You can click on the Review link to access the section in your eText. Consider the table of Standard Thermodynamic Quantities for Selected Substances at 25 °C. Substance AH; (kJ/mol) Substance AH; (kJ/mol) Substance AH; (kJ/mol) Al(g) HCl(aq) NF₂ (g) Al₂O₂ (s) Cr(g) NH:(E) F(g) C(g) CH₂(g) C₂H₂(g) C₂H₂(g) C₂H6(g) CO(g) CO₂ (g) Cl(g) HCl(g) 330.0 -1675.7 716.7 -74.6 227.4 52.4 -84.68 -110.5 -393.5 121.3 -92.3 HF(g) HF (aq) H(g) Fe(g) FeO(s) Fe₂O₂ (s) Fe₂O4(s) N(g) -167.2 396.6 79.38 -273.3 -335.0 218.0 416.3 -272.0 -824.2 -1118.4 472.7 NH3(aq) O(g) O₂(g) S(g) SO₂(g) SO3(g) Sn(g) SnO(s) SnO₂ (s) -132.1 -45.9 -80.29 249.2 142.7 277.2 -296.8 -395.7 301.2 -280.7 -577.6 Part A Enter an equation for the formation of HF(g) from its elements in their standard states. Express your answer as a chemical equation including phases. Part C ΑΣΦ 6 A chemical reaction does not occur for this question. Part B Complete previous…
The reaction 2N20(g) 2N2(3) + O2(g) has AH° = -163.14 kJ. What is the value of AE for the decomposition of 112 g of N20 at 25 °C? If we assume that AH doesn't change appreciably with temperature, what is AE for this reaction at 296 °C? At 25 C: ΔΕ i kJ At 296 °C: AE = i kJ
Predict the sign of ASº, +, -, or 0, for each of the following reactions and drag it into the boxes: • Lead nitrate (Pb(NO3)2) and potassium iodide (KI) solutions form a precipitate of lead iodide (Pbl2) when mixed • Ice melts at 0°C 0 • Magnesium metal reacts with oxygen gas to form solid magnesium oxide ● Hydrogen gas (H₂) and chlorine gas (Cl₂) react to form hydrochloric gas (HCI) gas + O
Q3
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
8. Note: Please don't write on a paper, I can't understand handwrittens.
1.) Complete A and B to move on. a.) Write the complete, balanced chemical equation for the following reaction on a separate sheet of paper. Provide products where they are not given. Assume that the reaction is spontaneous. Propane (C3H8) + oxygen → carbon dioxide + water Type the sum of the coefficients in the equation into the answer blank. If there is no coefficient, count it as one. Include ( g, s, l, or aq) b.) Write the complete, balanced chemical equation for the following reaction on a separate sheet of paper. Provide products where they are not given. Assume that the reaction is spontaneous. Diphosphorus pentoxide + water → Type in the coefficient and formula for the product in the equation that contains phosphorus. Include ( g, s, l, or aq)
3.
AH Changes sign when a Click on the process is reverNod screen when you started and its derivative demonstrate that the reaction enthalpy, AH, changes sign when a process is reversed. button within the activity and analyze the relationship between the two reactions that are displayed. The reaction that was on the Consider the reaction H2O(1)→H2O(g), AH = 44.0kJ What will AH be for the reaction if it is reversed? Express your answer with appropriate units. > View Available Hint(s) ? HA Value Units
a calculate AS (universe) for the decomposition of 1 mol of gaseous phosphine ( PH3) to form white phosphorus and gaseous hydrogen at 25 °C. S* (J/mol. K) A,H* (kJ/mol) Compound 0₂ (8) H₂(g) H₂O(l) P4 (s, white) PH3(g) N₂(g) NH3(g) Cl₂(g) HCl(g) CO₂(g) C(s, graphite) AS* (universe) 205.07 130.7 69.95 41.1 210.24 191.56 192.77 223.08 186.2 213.74 0 J/K 0 0 -285.83 0 5.47 0 -45.90 0 -92.31 -393.509 5.6
25°C 32°C bum wohl 891 10 228 1. Two aqueous reactants are mixed in a flask with a balloon over the top and the following change is observed. What are the signs on q and w for the system? Enter >, <, or in each box below. W 0 2. You drop a piece of potassium metal into water and the following exothermic reaction occurs: 2 K(s) + 2 H₂O(l) → 2 KOH(aq) + H₂(g) What are the signs on q and w for this reaction, at constant temperature and pressure? A) q is positive and w is negative. B) q is negative and w is positive. C) q and w are both negative. D) q and w are both positive. E) There is not enough information given. 3. What is the change in internal energy when one mole of helium gas in a flexible-walled container at STP is heated to 100°C? (CHe(g) = 5.30 J/g°C) AU =