Delta H(rxn) = 2*B.E.(O=O in ozone) - 2*B.E.(O=O in oxygen)
-391.9 = 2*(x) - 2*(498)
x = 302.5
B.E. in O3 = x = 302.5 KJ/mol
5. Given the enthalpy of the following reaction | 03 (g) + 0 (g) – 20...
Calculate AH for the following reaction using the given bond dissociation energies. >co,g)+2H,0(g) AH° (kJ/mol) CHg)20,g) Bond 142 О-О Н-О 459 С-Н 411 799 O O 498 С-О 358 Number ΔΗ. kJ/ mol This reaction is endothermic exothermic
5. Methanol gas combustion is represented with the following reaction 2 H3C-O-H(g) + 3 0=0(g) 20=C=O(g) + 4H-O-H(g) Calculate the AH x using the average bond dissociation energies from the table below, for 1 mole of methanol. Bond Energy kJ/mol Bond Energy kJ/mol Bond Energy kJ/mol Bond Bond 436 347 414 611 389 Bond C-C Сс Cc C-N CEN C-o H-H HC H- N H-O HS HF H-C1 HBr H- 837 305 615 891 8 565 163 418 946 222...
(NO(g)) = 20. Determine the enthalpy for the following reaction, given AH (NH3(g)) = -46.1 kJ/mol, AH +90.3 kJ/mol, and AH (H2O(g)) = -241.8 kJ/mol. 4NH3(g) + 502(g) → 4NO(g) + 6H2O(g) AH x = ? kJ a. -1274 kJ/mol d. -905.2 kJ/mol b. -1,996 kJ/mol e. -105.4 kJ/mol c. +1,274 kJ/mol
physical chemistry
2. The bond dissociation energy of oxygen gas is 495 kJ/mole, while the enthalpy of formation of ozone gas (O3(g))is 142.3 kJ/mole. For the reaction: NO +O3(g) NO2(g) + O2(g) it is found that AH = -198.9 kJ/mole, Determine the enthalpy change for the reaction: NO(g) + O() NO2(8)
What is the enthalpy of the reaction for the following equation: 2CH3OH(l) + 3O2(g) -----> 2CO2(g) + 4H2O(g) Given the following bond enthalpies (in kj/mol): C-H (414); C-O (360); C=O (799); O=O (498); O-H (464). Note: O=C=O
Calculate AH® for the reaction using the given bond dissociation energies. CH, (g) +202(9) — CO2(g) + 2 H2O(g) Bond AH° (kJ/mol) 0-0 | 142 H-0 459 C-H 411 C=0 799 O=0 498 C-0 358 This reaction is kJ/mol AH° = O endothermic. O exothermic.
1. Calculate the standard enthalpy of reaction for the reaction below, 3502(g) + 03(g) → 3503(g) Using only the following thermochemical data: 250(g) + O2(g) → 2502(g) AH° = -602.8 kJ 3503(g) → 350(g) + 203(9) AH° = +1485.0 kJ 202(g) → 03(9) AH° = +142.2 kJ
5. Calculate the enthalpy of formation of carbon dioxide in the following reaction: C(s) + O2(g) - CO. (g) 213 Use the following equations: 2) H.O (0) -- H() .O() AH: 285.8 kJ/mol b) CH. (g) -- 2C). 3H2(g) AH: +84.7 kJ/mol c) 200,(e) +3H.0 (6-- C.H. (B). (7/2)0,() AH - 1560.7 kJ/mol
6. Given the following thermochemical reactions 2NO N,+O 2NO+O,2NO AH=-180 kJ AH=-112 kJ Calculate the enthalpy change of the reaction of nitrogen with oxygen to produce nitrogen dioxide. N,+20,2NO, AH r? Lo Given the following standard enthalpy of formations: AHor [C2H$OH(I) =-277.7 kJ/mol]; AHOr [CHCO2H) =-484.5 kJ/mol]; AHr [H2O) = -285.8 kJ/mol]; AHn[O2(g) = 0 kJ/mol]. Calculate the AHn for the reaction. C,H.OH()+O,(g) ->CH,CO,H() + H2O(1)
20. What is the standard enthalpy change for the following reaction? 3CH.(g) + 40,(g) - 3C02(g) + 6H2O(g) AH® (kJ/mol) CHig) - 74.87 03(g) +142.7 CO2(g) --393.5 H2O(g) -241.8 a. -2285.1 kJ b.-2977.5 kJ c. +2977.5 kJ d. +2285.1 kJ e. -3426.5 kJ