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Activity#3: Enthalpy 1. Calcium carbide, CaC, is the raw material used for the production of acetylene, C,H, (used in welding torches). Calcium carbide is produced by reacting calcium oxide with carbon, producing carbon monoxide, CO as a byproduct. When one mole of calcium carbide is formed, 454.8 kl of heat is absorbed, CaQa +3C+ CaC + CO AH = 464.8 kJ

Activity#3: Enthalpy 1. Calcium carbide, CaC, is the raw material used for the production of acetylene, C,H, (used in welding torches). Calcium carbide is produced by reacting calcium oxide with carbon, producing carbon monoxide, CO as a byproduct. When one mole of calcium carbide is formed, 454.8 kl of heat is absorbed, CaQa +3C+ CaC + CO AH = 464.8 kJ

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Activity #3: Enthalpy 1. Calcium carbide, Cac, is the rawmaterial used for the production of acetylene, C,H,, (used in welding torches). Calcium carbide is produced by reacting calcium oxide with carbon, producing carbon monoxide, CO as a byproduct. When one mole of calcium carbide is formed, 454.8 kl of heat is absorbed, CaOe +3C → CaCe + COs) AH = 464.8 kJ a. Whatis the change in enthalpy when 1.00 g of calcium carbide is formed? b. If the enthalpy change for the reaction is 245.7 kl, what mass of calcium carbide is produced? c. What is the enthalpy change if 45.7 g of carbon reacts with excess calcium oxide? d. How manygrams of carbon are used up when 20.00 kJ of heat are absorbed? e. How manygigajoules of energyis required to consume 1.38x10 g calcium oxide? 2. Given the following thermochemical equations, calculate the change in enthalpy for the formation of one mole of gipitrogen pentoxide from its elements in their stable state at 25°C and 1 atm. (A) 2Halej +0la → 2H,0 AH = - 571.6 kJ (B) N,0 +H,0 + 2HNO AH = - 73.7 kJ sg) (C) N +01e +H+ HNO, AH = - 174.1 kJ 3. Given the following reactions, calculate the heat of formation of hydrazine in megaioules. (A) + AH = - 241.8 kJ (B) +0%g → Ng +2H,0 AH = - 534.2 kJ 4. Compute for the standard change in enthalpy of the following reactions: a. Pbo + C → CO + Pb b. Ça(OH)z +co + Cacoala + H,0 c. 2H,SO4 + 2H,0g + Ozk + 250zig) 5. Given 2CuO+ 2Cu +0, AH° = 314.6 kl a. Determine the heat of formation of Cuo. b. Calculate the standardenthalpy change for the formation of 13.58 g of Cuo.
Transcribed Image Text:Activity #3: Enthalpy 1. Calcium carbide, Cac, is the rawmaterial used for the production of acetylene, C,H,, (used in welding torches). Calcium carbide is produced by reacting calcium oxide with carbon, producing carbon monoxide, CO as a byproduct. When one mole of calcium carbide is formed, 454.8 kl of heat is absorbed, CaOe +3C → CaCe + COs) AH = 464.8 kJ a. Whatis the change in enthalpy when 1.00 g of calcium carbide is formed? b. If the enthalpy change for the reaction is 245.7 kl, what mass of calcium carbide is produced? c. What is the enthalpy change if 45.7 g of carbon reacts with excess calcium oxide? d. How manygrams of carbon are used up when 20.00 kJ of heat are absorbed? e. How manygigajoules of energyis required to consume 1.38x10 g calcium oxide? 2. Given the following thermochemical equations, calculate the change in enthalpy for the formation of one mole of gipitrogen pentoxide from its elements in their stable state at 25°C and 1 atm. (A) 2Halej +0la → 2H,0 AH = - 571.6 kJ (B) N,0 +H,0 + 2HNO AH = - 73.7 kJ sg) (C) N +01e +H+ HNO, AH = - 174.1 kJ 3. Given the following reactions, calculate the heat of formation of hydrazine in megaioules. (A) + AH = - 241.8 kJ (B) +0%g → Ng +2H,0 AH = - 534.2 kJ 4. Compute for the standard change in enthalpy of the following reactions: a. Pbo + C → CO + Pb b. Ça(OH)z +co + Cacoala + H,0 c. 2H,SO4 + 2H,0g + Ozk + 250zig) 5. Given 2CuO+ 2Cu +0, AH° = 314.6 kl a. Determine the heat of formation of Cuo. b. Calculate the standardenthalpy change for the formation of 13.58 g of Cuo.
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