Calculate the energy change of the following reaction: 2NO + O2→ 2NO2 ΔH: NO = 90.0 kJ/mol NO2= 34.0 kJ/mol O2= 0.0 kJ/mol  a -180 kJ  b -112 kJ  c 35.0 kJ  d -248 kJ

Use the table below to determine ΔH for the following reactionN 2H 4(g) + H 2O(g) ↔ NH 2OH(g) + NH 3(g) Bond Energies, kJ/mol Single Bonds   H C N O S F Cl Br I H 432                 C 411 346               N 386 305 167             O 459 358 201 142           S 363 272 --- --- 286         F 565 485 283 190 284 155       Cl 428 327 313 218 255 249 240     Br 362 285 243 201 217 249 216 190   I 295 213 --- 201 --- 278 208 175 149 Multiple Bonds C=C 602 C=N 615 C=O 799 C≡C 835 C≡N 887 C≡O 1072 N=N 418 N=O 607 S=O (in SO2) 532 N≡N 942 O2 494 S=O (in SO3) 469

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Given the heat of formation of the following compounds:                 CO2(g)                ΔfH° = -393.5 kJ/mol                 H2O(l)                 ΔfH° = -285.9 kJ/mol                 CH3OH(l)          ΔfH° = -238.6 kJ/mol   What is the value of ΔrH° for the reaction:                 CH3OH(l) + 3/2 O2(g) → CO2(g) + 2 H2O(l)

thway | Algebra. Pt Periodic Table - Pta... Scientific Calculator Gravitational Force... Conservation of Mo... Part 1-Combustion of Methane Equation for Enthalpy AH = Hbonds broken- Hsonds formed The following table is a list of selected bond energies. The bonds present in this table are common bonds for combustion reactions Selected Bond Energies Bond Energy (kI/mole) Bond Bond Energy Bond (kl/mole) H-H 436 C=0 799 O-0 495 C-C 348 O-H 463 C=C 614 C-H 413 C-C (aromatic) 519 C-O 358 N=0 623 Use the following balanced equation and chart to complete the bond energy calculations for the fuel, methane CH+202-CO2+2 H20 Compound Total Bond Energy Oxygen, O2 495 kJ/mol Carbon Dioxide, CO, 1598 kl/mol Water, H,O 926 kJ/mol

An electrical heater adds 25.3 kJ of heat to a constant-volume calorimeter. The temperature of the calorimeter rises by 4.55 °C. When 1.75 g of methanol is burned in the same calorimeter, the temperature increases by 7.14 °C. Calculate the molar energy of combustion of methanol. kJ/mol

Find the ΔH for the reaction below, given the following reactions and subsequent ΔH values: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)   3 C(s) + 4 H2(g) → C3H8(g)           ΔH = – 118.2 kJ C(s) + O2(g) → CO2(g)                   ΔH = – 62.4 kJ H2(g) + 1/2 O2(g) →  H2O(g)          ΔH = – 182.5 kJ

1. What is the enthalpy of reaction per mole of HCl (g) in the following reaction.( Don't have to explain why) 4HCl (g) + O2 (g) → 2Cl2 (g) + 2H2O + 114.4 kJ a) -457.6 kJ / mol b) -114.4 kJ / mol c) -28.6 kJ / mol d) +114.4 kJ / mol 2. The standard enthalpy of formation of a compound represents: a) The thermal energy released by the decomposition of one mole of this compound. b) The change in enthalpy when a mole of this compound is formed from its elements under standard conditions. c) The change in enthalpy when one mole of an element turns into a compound. d)The thermal energy released by the complete combustion of one mole of this compound. e) The enthalpy change of the phase transition of one mole of this compound.

A 3.59°C increase in temperature occurs when a 0.232 g sample of benzoic acid (C7H6O2) is combusted in a bomb calorimeter. A 1.81 °C increase in temperature occurs when a 0.303 g sample of citric acid (C6H8O7) is combusted in the same bomb calorimeter. The heat of combustion of benzoic acid is -26.37 kJ/g. What is the molar heat of combustion of citric acid? Reminder: Any heats of combustion will be negative since these are exothermic reactions.

The combustion of 0.1566 g benzoic acid increases the temperature of a bomb calorimeter by 2.51°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) Heat capacity = kJ/°C A 0.2195-g sample of vanillin (Cg H3 O3) is then burned in the same calorimeter, and the temperature increases by 3.21°C. What is the energy of combustion per gram of vanillin? Energy = kJ/g Per mole of vanillin? Energy = kJ/mol