A chemist measures the enthalpy change AH during the following reaction: 2 Al(s) + Fe,O3(s)→Al,03(s) + 2 Fe(s) AH=-852. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ Al,0, (s) + 2Fe(s) - 2A1(s) + Fe,0, (s) O kJ Al,0, () + Fe(s) - Al(G) + AIG) + Fe,0,() - A1,0,6) + reC)

A chemist measures the enthalpy change AH during the following reaction: 2 Al(s) + Fe,O3(s)→Al,03(s) + 2 Fe(s) AH=-852. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ Al,0, (s) + 2Fe(s) - 2A1(s) + Fe,0, (s) O kJ Al,0, () + Fe(s) - Al(G) + AIG) + Fe,0,() - A1,0,6) + reC)

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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A chemist measures the enthalpy change AH during the following reaction: 2 Al(s) + Fe,03(s)→ Al,O3(s) + 2 Fe(s) AH=-852. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. ol. reaction ΔΗ Ar 4Al (s) + 2Fe,O,(s) → 2Al,0, (s) + 4Fe(s) Al, 0, (s) + 2Fe(s) 2A1 (s) + Fe, 03 (s) |kJ 3 Al,0, (s) + 6Fe(s) → 6A1(s) + 3Fe,0, (s) kJ Explanation Check © 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility
Calculate the change in enthalpy for the reaction of solid carbon (graphite) converting into solid carbon (diamond): C(s, graphite) → C(s, diamond) AHxn = ?? using the following information: C(s, graphite) + O2(g) → CO2(g) AHn = -393.41 kJ/mol C(s, diamond) + O2(g) → CO2(g) ΔΗ, = -395.30 kJ/mol %3D rxn
2. The standard enthalpy changes for the formation of aluminum oxide and iron (III) oxide are 2 Al(s) + O2(g) → Al2O3(s) ΔΗ = -1676kJ 2 Fe(s) + O2(g) → Fe2O3(s) AH = -824kJ Calculate AH for the reaction: Fe2O3 (s) +2 Al(s) → Al2O3(s) + 2 Fe(s) ΔΗ = kj
Calculate the standard enthalpy change for each of the following reactions. 1. Mg(OH)2(s)→MgO(s)+H2O(l) Express your answer in kilojoules to one decimal place. 2. N2O4(g)+4H2(g)→N2(g)+4H2O(g) Express your answer in kilojoules to one decimal place. 3. SiCl4(l)+2H2O(l)→SiO2(s)+4HCl(g) Express your answer in kilojoules to one decimal place.
A chemist measures the enthalpy change AH during the following reaction: Sg(s) + 24 F,(g)→8 SF(g) AH=-9672. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ 10 SSF, (3) → S, (3) + 24F, (z) S,6) + 6F, (g) 2SF, (3) 4 4 SF, (e) -- S,(1) + 4F, (3)
Aluminum reacts with iron(III) oxide in the thermite reaction according to the thermochemical equation below. 2Al(s) + Fe2O3(s)⟶⟶2Fe(s) + Al2O3(s). ΔΔHor = -851.5 kJ/mol What is the enthalpy of this reaction when 13.0 g of aluminum reacts with excess iron(III) oxide? The molar mass of aluminum is 26.98 g/mol.
A scientist measures the standard enthalpy change for the following reaction to be -57.0 kJ:Ca(OH)2(aq) + 2 HCl(aq)CaCl2(s) + 2 H2O(l)Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(l) is ___ kJ/mol.
A chemist measures the enthalpy change AH during the following reaction: 2 Al(OH)3(s)-Al₂O3(s) + 3H₂O(1) ΔΗ = 41. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ALO3(s) + 3H₂O(1)→ 2Al(OH), (s) 4A1 (OH), (s) → 2AL₂O₂ (s) + 6H₂0 (1) — Al₂O3(s) + H₂O0(1) — AI(OH), (s) ΔΗ kJ KJ X S
The standard enthalpy change for the following reaction is 657 kJ at 298 K. SiCl4(g) Si(s) + 2 Cl₂(g) ΔΗ° = 657 kJ → What is the standard enthalpy change for this reaction at 298 K? Si(s) + 2 Cl₂(g) - - SiCl4(g) kJ
You mix 125 mL of 0.210 M CsOH with 50.0 mL of 0.525 M HF in a coffee-cup calorimeter, and the temperature of both solutions rises from 21.30 °C before mixing to 23.73 °C after the reaction. CsOH(aq) + HF (aq) → CsF(aq) + H₂O(l) What is the enthalpy of reaction per mole of CsOH? Assume the densities of the solutions are all 1.00 g/mL, and the specific heat capacities of the solutions are 4.2 J/g. K. Enthalpy of reaction = kJ/mol
Important values if needed for this question. A scientist measures the standard enthalpy change for the following reaction to be -901.8 kJ : Fe203(s) + 2 AI(s): Al203(s) + 2 Fe(s) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of Al203(s) is kJ/mol.
How much heat in kilojoules is evolved or absorbed in the reaction of 1.75 g of Na with H2O? 2Na(s)+2H2O(l) →2NaOH(aq)+H2(g) ΔH∘=−368.4 kJ is the reaction endo- or exothermic?