The enthalpy diagram indicates the enthalpies of formation for four compounds made from the elements listed on the "zero" line of the vertical axis [C(s), H,(g),O,(g]. 300 СН.) 200 100 C(1), H,(g), O,(g) 0. -100 COO) -200 Н.О() -300 Co,) -400 Why is acetylene, C2H2(g), sometimes called an "endothermic'compound? Choose one: OA Liquid and gaseous acetylene are both cold to the touch. ENEF O B. The process of forming acetylene from the elements in their standard states absorbs energy. C. The combustion of acetylene in oxygen creates cold fire that absorbs heat. D. The combustion of acetylene in oxygen releases large amounts of heat. hewo How Part 3 ( OSee Hint The standard enthalpies of formation, AH.for C2H2(g). Ozlg). CO(g), H2O(g). and CO(g are given in the table. Use this information to calculate the overall heat of the reaction that converts 1 mole ofCH(g and a stoichiometric amount of Oz(g) into CO(g) and H2O(g. Hint: Start by writing a balanced thermochemical equation for the reaction. Compound AH: (k/mol). CaH2(e 226.7 Ozle 0.0 Co(g -110,5 H2O(2 СОДа

The enthalpy diagram indicates the enthalpies of formation for four compounds made from the elements listed on the "zero" line of the vertical axis [C(s), H,(g),O,(g]. 300 СН.) 200 100 C(1), H,(g), O,(g) 0. -100 COO) -200 Н.О() -300 Co,) -400 Why is acetylene, C2H2(g), sometimes called an "endothermic'compound? Choose one: OA Liquid and gaseous acetylene are both cold to the touch. ENEF O B. The process of forming acetylene from the elements in their standard states absorbs energy. C. The combustion of acetylene in oxygen creates cold fire that absorbs heat. D. The combustion of acetylene in oxygen releases large amounts of heat. hewo How Part 3 ( OSee Hint The standard enthalpies of formation, AH.for C2H2(g). Ozlg). CO(g), H2O(g). and CO(g are given in the table. Use this information to calculate the overall heat of the reaction that converts 1 mole ofCH(g and a stoichiometric amount of Oz(g) into CO(g) and H2O(g. Hint: Start by writing a balanced thermochemical equation for the reaction. Compound AH: (k/mol). CaH2(e 226.7 Ozle 0.0 Co(g -110,5 H2O(2 СОДа

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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