Diamond and graphite are two crystalline forms of carbon. At 1 atm and 25°C, diamond changes to graphite Нехn for slowly that the enthalpy change of the process must be obtained indirectly. Determine A So rxn C(diamond)Cgraphite) with equations from the following list: (1) С(diamond) + O,g) (2) 2 CO2(g) CO2(g) 2 CO(g)02(g) ДН %—D —395.4 kJ = AH 566.0 k.J + (3) C(graphite)+02(s) -»CO2(g) (4) 2 CO(g)C(graphite)+CO2(g) ДН %3D —393.5 kJ AH=-172.5 kJ ДНov kJ overall

Diamond and graphite are two crystalline forms of carbon. At 1 atm and 25°C, diamond changes to graphite Нехn for slowly that the enthalpy change of the process must be obtained indirectly. Determine A So rxn C(diamond)Cgraphite) with equations from the following list: (1) С(diamond) + O,g) (2) 2 CO2(g) CO2(g) 2 CO(g)02(g) ДН %—D —395.4 kJ = AH 566.0 k.J + (3) C(graphite)+02(s) -»CO2(g) (4) 2 CO(g)C(graphite)+CO2(g) ДН %3D —393.5 kJ AH=-172.5 kJ ДНov kJ overall

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...

See similar textbooks

Similar questions

Determine the enthalpy of the reaction: 3Fe,O; (s) + CO (g) → CO, (g) + 2Fe;O4 (s), given the following reactions. 38. Fe,O3 (s) + 3CO (g) → 2Fe (s) + 3CO, (g) AH= -28.0 kJ 3Fe (s) + 4CO2 (s) → 4CO (g) + Fe;O4 (s) AH =+12.5 kJ A) 40.5 +109 -59.0 -109
2 SO2(g) + O2(g) 2 SO3(g) Calculate the standard change in enthalpy of the reaction, H\deg rxn using standard enthalpies of formation.
and 2 Enthalpy #1.30 enoindice pled TT 2010 2D49.bs 22) When 1 mole of Fe2O3(s) reacts with H₂(g) to form Fe(s) and H2O(g) according to the following equation, 98.8 kJ of energy are absorbed. (6 Fe2O3(s) + 3 H2(g) → 2 Fe(s) + 3 H₂O(g) (pp) (20/d4 (pm) $40 D Reaclanis 13:48 SH Products endothermic, A endothermic, B (2) exothermic, A exothermic, B nad W (21 Enthalpy MOMS. Reactants Products (A) (B) Is the reaction endothermic or exothermic, and which of the enthalpy diagrams above represents grow olor and to noin (01 this reaction? SH GH TH A HOMH X HILD 08.10 Page 6 of 8
Compound ΔHf° (kJ/mol) CH3OH(l) –238.7 O2(g) 0.00 CO2(g) –393.5 H2O(l) –285.8 How many grams of methanol must be combusted to raise the temperature of 441 g of water from 19.5°C to 44.16°C? Assume that the transfer of heat from the methanol flame to the water is 100% efficient. = 2
Calculate the standard enthalpy of formation for C3H6O (l) from its combustion using the following data: Enthalpy of this combustion is -1793 kJ ( you must write a balanced reaction first).
12.00 g of Compound with molecular formula C4h8 are burned in a constant-pressure calorimeter containing 15.00 kg of water at 25 °C. The temperature of the water is observed to rise by 8.603 °C. (You may assume all the heat released by the reaction is absorbed by the water, and none by the Calculate the standard heat of formation of Compound X at 25 °C. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits. calorimeter itself.)
Study the following thermochemical data very carefully: Clelg) lag) ICI(g) Ia(s) 2C(g) 21(g) I(g) + CI(g) la(g) AH = 242.3 kJ AH = 151.0 kJ AH = 211.3 kJ AH = 62.8 kJ I2(s) reacts with Clag) to produce ICI(g). Write the chemical equation to produce ONLY one mole of ICI(g)
An ideal gas sealed in a rigid 3.13-L cylinder, initially at pressure Pi=12.70 atm, is cooled until the pressure in the cylinder is Pf=1.18 atm. What is the enthalpy change for this process?What is the change in internal energy for this process?
Which of the following reactions occuring at 25° C defines the standard enthalpy of formation (TriangleHf) of liquid water? - 2 H (g) + O (g) -> H2O (l) - H2O(g) + O (g) -> H2O (l) - H2 (g) + ½O2 (g) -> H2O (l) - 2 H2 (g) + O2 (g) -> 2 H2O (l)
PCI5(s) can be prepared by the reaction PCI3(1) + Cl2(g) - PCI5(s). Calculate the enthalpy change (in kJ) that accompanies the production of 100.0 g of PCI5(s) by the above reaction, given the following data. P4(s) + 6 Cl2(g) - 4 PC|3(1) AH° = -1280 kJ per mole of P4(s) %3D P4(s) + 10 Cl2(g) – 4 PCI5(s) ΔΗ AH° = -1774 kJ per mole of P4(s) +59.3 -59.3 +124 -124 -258
(b) The standard enthalpy change for the following reaction is -697 kJ at 298 K.2 Zn(s) + O2(g)2 ZnO(s)What is the standard heat of formation of ZnO(s)
20) The standard enthalpy change for the reaction below is -196.0 kJ. Use Table below to calculate the standard enthalpy of formation of H₂O (1). 2H₂O2 (1) ->>> 2H₂O (1) + O₂ (g) Substance H₂O2 (1) AH° (kj/mole) -187.8