Part AUse standard enthalpies of formation to calculate AH for the following reaction.2NaHCO3 (8)→Na20(s) + 2C0,(g) + HzO(g)Express your answer using four significant figures.AHnkJ%3DSubmitRequest Answermistry .com/myct/itemView?assignmentProblemID=174388865&offset-prev

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Answered: Use standard enthalpies of formation to…

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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4 CH3NH2 (g) + 2 H2O (l) ➝ CO2 (g) + 3 CH4 (g) + 4 NH3 (g) ΔHº = –138.96 kJ• Calculate the overall change in enthalpy when 30.00 grams of CH3NH2 (g) reacts with excess H2O (l). [Be sure to include the correct sign.]
The hypothetical element X and an oxide of X undergo the following reactions with oxygen, with the listed enthalpy changes: 4 X(5) + 3 02(g) – 2 X203(g) AHrxn = -400.0 kJ 4 XO2(g) – 2 X203(g) + O2(g) AHrxn - +200.0 kJ Using the above information, determine AHrxn for the following reaction: X(S) + O2g) – XO22) O -200.0 k) O -600.0 kJ O -150.0 k) O 200.0 kJ
3. Calculate the enthalpy change for the reaction P406 (s) + 2 02 (g) → P4010 (s) given the following enthalpies of reaction: AH = -1640.1 kJ P4 (s) + 3 02 (g) P4 (s) + 5 02 (g) → P406 (s) → P4010 (s) AH = -2940.1 kJ
Given the two thermochemical equations below, find the enthalpy change for the reaction: N2H4 (l) + H2 (g) → 2 NH3 (g) delta H = ? Given: N2O4 (g) + 3 H2 (g) → 2 NH3 (g) + 2 O2 (g) delta H = – 100.96 kJ N2O4 (g) + 2 H2 (g) → N2H4 (l) + 2 O2 (g) delta H = + 41.47 kJ Select one: a. – 142.43 kJ b. – 59.49 kJ c. + 41.47 kJ d. + 59.49 kJ e. + 142.43 kJ f. none of these g. – 100.96 kJ
For which one of the following is the enthalpy of the reaction the same as the enthalpy of formation? A) 2 H (g) + Se (s) → H:Se (g) B) KOH (s) → K*(aq) + OH- (aq) C) 2 Fe (s) + 3 Cl2 (g) → 2 FeCl3 (s) D) Ni (s) + ½ O2 (g)- NiO (s)
Calculate the standard enthalpy for the reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), given the following data: N2(g) + O2(g) → 2NO(g) ΔHrxn = -43.1 kcal mol-1 N2(g) + 3H2(g) → 2NH3(g) ΔHrxn = -21.9 kcal mol-1 2H2(g) + O2(g) → 2H2O(g) ΔHrxn = -115.6 kcal mol-1 Round your answer to 2 decimal places.
Use the thermochemical equations shown below to determine the enthalpy for this reaction: 2 H2O(g) + 2 Cl2(g) →4 HCl (9) + O2(g) ΔΗ xn Information: COCI 2(g) + H2O(l) → CH2Cl2(1) + O2(g) AH = 19 kJ H2O(g) →H2O(l) AH = -44 kJ HCI (g) 1/2 H2(g) +1/2 Cl2(g) AH = 92 kJ CH2Cl2(1) + H2(g) + 3/2 O2(g) → COCI 2(g) + 2 H2O (1) AH=-161k]
The enthalpy change for the oxidation of butane, C4H₁0, is measured by calorimetry. C4H10 (g) + 13/2 O2(g) → 4 CO2 (g) +5 H₂O(l) A₂H = -2877.6 kJ/mol-rxn Use this value, along with the standard enthalpies of formation of CO2(g) and H₂O(l) (-393.509 kJ/mol and -285.83 kJ/mol respectively), to calculate the enthalpy of formation of butane, C4H10, in kJ/mol. Enthalpy of formation = Submit Answer OCT 30 Try Another Version tv kJ/mol S4 I all 9 item attempts remaining Cengage Learning | Cengage Technical Support A MacBook Pro 7 ( O 04
Calculate the standard enthalpy of formation of acetylene (C2H2) from its element: 2C(graphite) + H2(g) → C2H2(g) The equations for each step and the corresponding enthalpy changes are C(graphite) + O2(g) → CO2(g) ΔH = -393.5 kJ/mol H2(g) + ½O2(g) → H2O(l) ΔH = -285.8 kJ/mol 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l) ΔH = -2598.8 kJ/mol ΔH = ?
Find the standard change in enthalpy for the following reaction. N₂H4(1) + O₂(g) → 2 NO(g) + 2 H₂O(g) Given the following known reactions: N₂(g) + 2 H₂(g) → N₂H₁ AH = 97.4 kJ/mol N₂(g) + O₂(g) → NO(g) AH = 90.2 kJ/mol H₂(g) + O₂(g) → H₂O(g) AH = -242 kJ/mol Remember you need to include O₂ to get a balanced reaction but its AH = 0 kJ/mol !!
A chemist measures the enthalpy change AH during the following reaction: 2 KCl(s) + 302(g) →2 KClO3(s) AH=78. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ. reaction ΔΗ ㅁ x10 2K C103 (s) → 2KC1(s) + 302(g) KCIO, (s)-KCI(s) + 0,(s) 3 KCI(s)+0, (g)KCIO, (s) kJ kJ 1 5
Calculate the enthalpy of formation of 1 mole SO₂(g) from the standard enthalpy changes of the following reactions: 2SO3(g)2SO₂(g) + O₂(g) 2S (s) +30₂(g) → 2SO3(g) →→ SO₂(g) S(s) + O₂(g) kJ ΔΗ AH rxn 1=+196 kJ rxn 2 = -790 kJ AHO rxn 3 = ? k

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Use standard enthalpies of formation to calculate AH for the following reaction. 2NaHCO3 (s)→Na20(s) + 2CO2(g) + H2O(g) Express your answer using four significant figures.