Given the standard heats of formation for the following compounds, calculate AH of the reaction at 298. CH HO + CHOHO H 242 -23 O OMal

( is the answer is + 46.48 or -46.48 plzz telll ...why + or why - also explain

Using heats of formation (deltaHf) calculate the true value for delta Hrxn for the hydrogen peroxide decomposition. Delta Hf for H2O2 (aq) is -191.2kJ/mol.

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What happens when fuel is added (like a carbon source)? Find the heat of the reaction for the following reaction. Compound AH; (kJ mol¯) N20 81.6 2 N20(g) + C(s) → 2 N2(g) + CO2(g) CO2 -393.51

Mass of Water Compounds Benzoic Acid + 1000 g Ignite Reset The heat capacity of the calorimeter vessel is 420 J/°C = Calculate A,E (kJ/mol) for the reaction. 1.11 x 10-3 mol sucrose AT 2.14 °C qwater = 5.37 kJ 9cal = 0.898 kJ X kJ/mol FUEGO [Review Topic www

[Review Topics] [Ref Calculate the standard enthalpy change, AH°, for the following reaction at 25°C. Fe2O3 (s) + 2A1(s) → 2Fe(s) + Al, O3 (s) What is the enthalpy change per mole of iron? Substance AH, kJ/mol Fe,O3 (s) -825.5 -1675.7 Standard enthalpy change = kJ Enthalpy change per mole of iron = Submit Answer Retry Entire Group 9 more group attempts remaining LAON tv P.

Use the molar bond enthalpy data in the table to estimate the value of AHin for the equation. rxn NH3(g) + 2O₂(g) → HNO3(g) + H₂O(g) The bonding in the molecules is shown. H AHixn = H O اس ای H + Bond O-H 0-0 C-O 0=0 C=O C-C C=C C=C C-H C-F C-Cl C-Br C-N C=N kJ. mol-¹ 464 142 351 502 730 347 615 811 414 439 331 276 293 615 Bond C=N N-H N-O N=N N=O F-F Cl-Cl Br-Br H-H H-F H-Cl H-Br H-S S-S kJ · mol-¹ 890 390 201 418 607 155 243 192 435 565 431 368 364 225 kJ.mol-¹

Consider the combustion of propane: C3H (9) + 50, (9)→ 3CO, (9) + 4H2 O(1) AH = -2221 kJ A balloon is being inflated to its full extent by heating the air inside it. In the final stages of this process, the volume of the balloon changes from 4.00 x 10° L to 4.50 x 10° L by the addition of 1.4 x 10 J energy as heat. Assume that all the heat comes from the combustion of propane. What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 50.% efficient? Mass =