The heat of combustion of acetylene, F2H2(g) + O2(g) → CO2(g) + H20(g) A „H° = -1300 kJ mol*1 %3D (a) Calculate the heat generated (in kJ) by burning 2.747 g of acetylene. We are looking for the absolute value of the heat here. = 137.1 V o kJ (b) If all the heat is transferred to a 2.292 kg sample of water, originally at 24.788 °C calculate the final water temperature. °C. (Enter the correct number of significant figures) Enter an integer or decimal number, with exactly 5 significant figures [more..]

The heat of combustion of acetylene, F2H2(g) + O2(g) → CO2(g) + H20(g) A „H° = -1300 kJ mol*1 %3D (a) Calculate the heat generated (in kJ) by burning 2.747 g of acetylene. We are looking for the absolute value of the heat here. = 137.1 V o kJ (b) If all the heat is transferred to a 2.292 kg sample of water, originally at 24.788 °C calculate the final water temperature. °C. (Enter the correct number of significant figures) Enter an integer or decimal number, with exactly 5 significant figures [more..]

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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Consider the following thermochemical equation: 2X2Y6(g) + 7O2(g) ⟶ 4XO2 + 6Y2O Δ?= -2.615 x 103 kJ Calculate the enthalpy change when 16.38 g of XO2 are produced in this reaction. The molar mass of XO2 = 47.28 ???? Report your answer as a positive number, in kJ, with 4 significant figures.
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Styrene (C8H8) is one of the substances used in the production of synthetic rubber and burns according to the following combustion reaction C8H8(l)+10O2(g)-->8CO2(g)+4H2O(l). Hrxn=-4.390x10^3 jk/mol what is the standard enthalpy of formation at 25 degrees Celsius? Hf[CO2(g)]=-393.5 kj/mol Hf[H2O(l)]=-285.8 kj/mol
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For the questions of the Experiment of Heat and Temperature: The Law of Dulong and Petit, the following data were obtained for the unknown element. specific heat (S) of unknown element (J/g⚫K) Aw of unknown element (g/mol) 0.339 63.96 b) Calculate the atomic heat (C) in J/mol K for the unknown element. 1) In this case, your answer should be in decimal notation (for example, 0.123, not 1.23*10^-1) with the correct number of significant figures. Also follow the unit specified in each question. Do NOT put its unit in your answer because its unit is shown already in the questions. 2) It means students shouldn't include any letters or text in the "Numeric answers", because otherwise it'll be marked wrong even if the numbers are correct. Type your answer...
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lgs everything else). e system (the part you are studyml (reaut nsi ost systems we are interested in will have a constant pressure, mean ing that q (heat or thermal energy) would be equivalent to the change in enthalpy (AH) We defined environments in which heat goes into the system surroundings get hot as exothermic ΔΗ- and the surroundings get cold as EX rmic AH + while environments in which heat goes out of the system and the For each of the environments below: (1) identify your system and surroundings and (2) predict whether it would be endothermic or exothermic. 1. a. Wood burning b. Water freezing c. Sweat evaporating d. Chemical hand-warmer
1a only