2. A calorimetric experiment was performed and the data collected is given below. Determine the molar enthalpy of reaction of Ca(s) with HCl(aq)- Ca(s) + HCl(aq) H2(g) + CaCl2(aq) Table 1: Observations for Calorimetry Experiment for the Reaction of Ca, with HCl(aq) Observations mass of Ca(s) volume of HCl(aq) initial temp of HCl (aq) final temp of HCl(aq) Experiment 1 0.51 g 98.5 mL 20.0°C 36.5°C [3]

2. A calorimetric experiment was performed and the data collected is given below. Determine the molar enthalpy of reaction of Ca(s) with HCl(aq)- Ca(s) + HCl(aq) H2(g) + CaCl2(aq) Table 1: Observations for Calorimetry Experiment for the Reaction of Ca, with HCl(aq) Observations mass of Ca(s) volume of HCl(aq) initial temp of HCl (aq) final temp of HCl(aq) Experiment 1 0.51 g 98.5 mL 20.0°C 36.5°C [3]

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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Given the standard enthalpy changes for the following two reactions: ΔΗ° (1) N₂(g) + 2O2 (g) → 2NO2 (g) (2) 2N₂O(g) → 2N2(g) + O2(g) ΔΗ° = 66.4 kJ Standard enthalpy change : = - 164.2 kJ What is the standard enthalpy change for the following reaction? (3) 2N₂O(g) + 3O2 (g) → 4NO2 (g) AH° =? kJ
Consider the following reaction. CH3OH(g) CO(g) + 2 H2(g) H = +90.7 kJ (a) Is the reaction exothermic or endothermic? endothermicexothermic (b) Calculate the amount of heat transferred when 40.0 g of CH3OH(g) are decomposed by this reaction at constant pressure.H = kJ(c) If the enthalpy change is 11.0 kJ, how many grams of hydrogen gas are produced? g(d) How many kilojoules of heat are released when 13.5 g of CO(g) reacts completely with H2(g) to form CH3OH(g) at constant pressure?H = kJ(e) Calculate E when 360.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K kJ HopHelpCh5N1
Consider the following reaction. CH3OH(g) CO(g) + 2 H2(g) H = +90.7 kJ (a) Is the reaction exothermic or endothermic? exothermic endothermic (b) Calculate the amount of heat transferred when 55.0 g of CH3OH(g) are decomposed by this reaction at constant pressure.H = kJ(c) If the enthalpy change is 11.0 kJ, how many grams of hydrogen gas are produced? g(d) How many kilojoules of heat are released when 12.0 g of CO(g) reacts completely with H2(g) to form CH3OH(g) at constant pressure?H = kJ(e) Calculate E when 450.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K
Consider the following reaction. CH3OH(g) CO(g) + 2 H2(g) H = +90.7 kJ (a) Is the reaction exothermic or endothermic? endothermicexothermic (b) Calculate the amount of heat transferred when 40.0 g of CH3OH(g) are decomposed by this reaction at constant pressure.H = kJ(c) If the enthalpy change is 11.0 kJ, how many grams of hydrogen gas are produced? g(d) How many kilojoules of heat are released when 13.5 g of CO(g) reacts completely with H2(g) to form CH3OH(g) at constant pressure?H = kJ(e) Calculate E when 360.0 g of CH3OH(g) completely reacts at a constant temperature of 300 K and constant pressure of 0.95 atm. R = 8.314 J/mol*K and R = 0.08206 atm*L/mol*K kJ HopHelpCh5N1
The following thermochemical equation is for the reaction of carbon dioxide(g) with hydrogen(g) to form acetylene(g) (C,H) and water(g). 2C02(g) + 5H2(g)–C,H2(g) + 4H,O(g) AH = 46.5 kJ When 15.3 grams of carbon dioxide(g) react with excess hydrogen(g), kJ of energy are | Hint: An amount of energy is expressed as a positive number. The sign of AH in the thermochemical equation indicates whether the energy is absorbed or evolved.
Use Hess’s law to calculate the enthalpy change for the reaction WO3(s) + 3H2(g) —> W(s) +3H2O(g) from the following data: 2W(s) + 3O2(g) —> 2 WO3(s) H=-1685.4 2H2(g) + O2(g) —> 2H2O(g) H=-477.84
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MN.19.
5(a)
Use the References to access important values if needed for this question. A scientist measures the standard enthalpy change for the following reaction to be -103.2 kJ: 4HCl(g) + O2(g) → 2H₂O(g) + 2Cl₂ (g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of HCl(g) is I kJ/mol red Species AH (kJ/mol) H₂O(g) -241.8 Cl₂(g) 0.0 0₂ (9) 0.0
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