a Calculate AH for the reaction 2K (:) + 2H,0(0) — 2КОН(ад) + H (9) Substance and State AHţ' (kJ/mol) K(s) KOH(aqg) H2 (9) H2O(1) -481 -286 AH° = -390 A 5.20-g chunk of potassium is dropped into 1.00 kg water at 24.2°C. What is the final temperature of the water after the preceding reaction occurs? Assume that all the heat is used to raise the temperature of the water. (Never run this reaction. It is very dangerous; it bursts into flame!) Temperature = °C

a Calculate AH for the reaction 2K (:) + 2H,0(0) — 2КОН(ад) + H (9) Substance and State AHţ' (kJ/mol) K(s) KOH(aqg) H2 (9) H2O(1) -481 -286 AH° = -390 A 5.20-g chunk of potassium is dropped into 1.00 kg water at 24.2°C. What is the final temperature of the water after the preceding reaction occurs? Assume that all the heat is used to raise the temperature of the water. (Never run this reaction. It is very dangerous; it bursts into flame!) Temperature = °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...

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Remaining Time: 58 minutes, 03 seconds. v Question Completion Status: A Moving to another question will save this response. Que uestion 15 5p For the reaction CO (g) + Cl2 (g) → CICOCI (g), AS xn = -47.0 Jmol"K-1 and AHryn = -220, kJ/mol. What is the standard Gibbs Free Energy, AG" rxn. for this reaction at 500 K? O -197 kJ/mol O-2.37x104 kJ/mol O 2.33x104 kJ/mol O -244 kJ/mol O 63.0 kJ/mol A Moving to another question will save this response. MacBook Air S F6 F5 吕口 F3 F2 & %23 $4 7 6. 4. R
Question 14 of 41 > Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCl(aq) → 2 MCI, (aq) + 3 H,(g) AH = -887.0 kJ 2. HCl(g) → HCI(aq) AH2 = -74.8 kJ 3. H, (g) + Cl, (g) → 2 HCl(g) AH3 = -1845.0 kJ 4. MCI,(s) → MCI, (aq) AH = -124.0 kJ Use the given information to determine the enthalpy of the reaction 2 M(s) + 3 Cl,(g) → 2 MCI, (s) ΔΗ - kJ A tv w MacBook Air DII DD F11 80 888 FB F5 F6 F7 F3 F4 386 & 23 24 delete 9 3 4. T. Y U + I| * C0
In a constant‑pressure calorimeter, 65.0 mL65.0 mL of 0.330 M Ba(OH)20.330 M Ba(OH)2 was added to 65.0 mL65.0 mL of 0.660 M HCl.0.660 M HCl. The reaction caused the temperature of the solution to rise from 22.07 ∘C22.07 ∘C to 26.57 ∘C.26.57 ∘C. If the solution has the same density and specific heat as water (1.00 g/mL1.00 g/mL and 4.184J/g⋅°C,)4.184J/g⋅°C,) respectively), what is Δ?ΔH for this reaction (per mole H2OH2O produced)? Assume that the total volume is the sum of the individual volumes.
At -13.0 °C the pressure equilibrium constant K, = 5.8 x 10 for a certain reaction. Here are some facts about the reaction: • Some of the reactants are liquids and solids. • If the reaction is run at constant pressure, the volume increases by 14.%. • The constant pressure molar heat capacity C = 2.03 J· mol. K'. - 1 %3D As Yes. 10 Using these facts, can you calculate K, at 0.80 °C? d. No. If you said yes, then enter your answer at right. Round it to 2 significant digits. Yes, and K, will be bigger. If you said no, can you at least decide whether K¸ at Yes, and K. will be 0.80 °C will be bigger or smaller than K̟ at –13.0 °C? smaller. d. No. Continue Submit Assignment 144H TAKING YOU TO A NEW REALITY et unvmedreabiy PREDATOR
I Review Constants Periodic Table For a certain chemical reaction, AH° = -35.8 kJ and AS° = -80.0 J/K. Part A Is the reaction exothermic or endothermic? O exothermic O endothermic Submit Prevlous Anewere v Correct Anegative enthalpy value indicates that energy is released by the system. Therefore, the reaction is exothemic. Part B Does the reaction lead to an increase or decrease in the disorder of the system? O increase O decrease Submit Previous Anawere v Correct The sign of the entropy change is negative, which indicates that the disorder, or entropy, of the system has decreased. • Part C Calculate AG for the reaction at 208 K. Express your answer using two significant figures. emplates Symbols undo redo feset keyboard shortcuts Help AG" = 7.98 kJ Submit Prevlous Anewere Requeet Anawer X Incorrect; Try Again; 4 attempts remaining
Hydrogen bromide dissociates into its gaseous elements, H2 and Brg, at elevated temperatures. AH, kl/mol S", J/(mol·K) HBr(9) -36.44 198.6 H2 (9) 130.6 Bra (9) 30.91 245.3 a. Calculate the percent dissociation at 383°C and 1.00 atm. (Enter your answer to three significant figures.) Percent dissociation % b. What would be the percent dissociation at 383°C and 10.0 atm? (Enter your answer to three significant figures.) Percent dissociation c. Use data above and any reasonable approximation to obtain К. (Enter your answer to three significant figures.) K=
(7) For reaction: H₂(g) + CO₂ (g) - H₂O (g) + CO (g). K.=0.534. If four gases initially have equal concentrations [H.]= [CO₂ ] [H₂O]= [CO] = 0.5 M, the value of the reaction quotient Qe M
6. Given the thermodynamic data below, what is the equilibrium constant Kea of the following popular science fair reaction at 25°C: H'(aq) + HCO3(aq) + CO2(g) + H₂O(g) Species AG% (kJ/mol) H* (aq) 0 HCOs aq) -587.1 CO2(g) -394.4 H₂O(g) -228.6 A. 7.1 x 10¹0 B. 2.0 x 106 C. 89 D. 1.0 E. 4.3 x 10-8 I
Please calculate the Ka for a weak acid given the following data: pH = 3.72, and an initial acid concentration of 1.43 x 10-4 M (note: please express your answer with 3 sig figs.; the equilibrium reaction is shown below:) НА(аq) + H,0 () H;O* (aq) + A´ (:
MISSED THIS? Read Section 19.8 (Pages 871-877); Watch IWE 19.6. Liquid methanol burns in oxygen to form gaseous carbon dioxide and gaseous water. Substance H (kJ/mol) S° (J/(mol · K)) CH, OH (1) -238.6 126.8 O₂(g) 0 205.2 CO₂(g) -393.5 213.8 CO2(aq) -413.8 117.6 H₂O(g) -241.8 188.8 H₂O(1) -187.8 70.0 ▼ Part D where no represents the stoichiometric coefficients of the products, n, represents the st of the reactants, and Sº represents the standard entropies. AGxn= Calculate AG at 25°C. Express your answer in kilojoules to three significant figures. Submit = Provide Feedback 15] ΑΣΦ Request Answer Part E Complete previous part(s) [2(S° co₂(g)) + 4(S° H₂O(g))]- [2(S° CH₂OH()) + 3(S° 0₂(E [2(213.8 J/K)+4(188.8 J/K)] - [2(126.8 J/K) + 3(2 314 J/K MacBook Pro P Pearson ? kJ Copyright © 2023 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions Contac
For a particular reaction △H= -32 kJ and △S = -98J/K (A) At what temp will the reaction be at equilibrium ? (B) If the temperature is increased from the equilibrium temperature what will happen?
Given the following data: FEE Conc. (M) Volume (mL) Tinitial (°C) Tfinal (°C) Solution NaOH 0.750 50.00 19.84 23.18 HCI 0.500 50.00 19.84 Calculate AH° for the reaction: HCl(aq) + NaOH(aq) H2O(1) + NaCl(aq) You may assume all solutions to have the same density and specific heat as water (1.00 g/mL and 4.184 J/g°C) kJ/mol