Strike anywhere" matches contain P4S3, a compound that ignites when heated by friction. It reacts vigorously with oxygen, as follows: P4S3(s) + 802(g) → P4010(s) + 3SO29) AH°reaction = -3,677 kJ %3D Jse data from the hint to determine AH°; for P4S3(s). i -1.54E2 kJ eTextbook and Media

Use your table of Heats of Formation to calculate the heat of reaction for the following reaction: C2H4(g)  +  3O2(g)  ⟶   2CO2(g)  + 2H2O(g)

Traduction: Given the reaction: determine the entalpy change for the next ecuation: 8. Dada la reaccion 4AICI3(s) + 302(g) → 2Al2O3(s) + 6CI2(g); AH= -529.0 kJ %3D determine AH para la siguiente rea ión Cl2(g) + %Al2O3(s) %AICI3(s) + ½O2(g) +529.0 kJ +88.2 kJ +176.3 kJ +264.5 kJ a)

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3) Calculate the reaction heat of formation of PbO from Pb and O2 at rxn temperatures of 500K and 800K seperately (using below reactions). Pb(s) + 1/2 O2(g) Pb(1) + 1/2 O2(g)- AH°298.PbO =-219400 J/mole Cp (PbO.s)-52.3 +8.66 x 10T- 8.2x10 T J/molK (298-1159 K) CP (Pb.s)-24.3 +8.7 x 10 T Cp (Pb.)= 32.5-3.1 x 10 T Cp(02g)-29.9 +4.18 x 10 T-1.7x10 T2 Pb(s)→ PbO(s) PbO(s) J/molK (298-600 K) J/molK (600-1300 K) J/molK (298-2500 K) Pb(1). AHmelting 4800 J/mole, Tmelting 600K

The reaction we performed was:                   Na(s) + H2O(l)    NaOH(aq) + 1/2H2(g)                               qreaction = rHo = -184 kJ/mol-rxn Assuming the dessicator jar is well insulated (like our coffee-cup calorimeter), the energy balance is:                  0 = qsystem = qreaction + qwater    qreaction = -qwater                  qreaction = -mwater*Cwater*Twater The data from the demonstration was:  (a) 1.0 kg water, (b) 22.0oC, (d) Cwater = 4.18 J/g-K, (e) mNa = 0.21 g What is Tfinal in centigrade?

9) One method for making ethanol, C2H5OH, involves the gas-phase hydration of ethylene, C2H4: Estimate AH for this reaction from the given average bond dissociation energies, D. Bond | D, kJ/mol C=C 615 H H H H С-Н 410 H C -C 0-H C-C 350 H H. 350 H H H H. 0–H 460

For the reaction 4HCI(g) + O₂(g) 2H₂O(g) + 2Cl₂(g) AH° = -114 kj and AS = -129 J/K At standard conditions, this reaction would be product favored Oat all temperatures. at relatively high temperatures. at no temperature. at relatively low temperatures

O-234 kJ 234 kJ -150. kJ -117 kJ Given: -1835kJ AH°, AHᵒf (kJ/mol) -941 -840 QUESTION 12 Use the standard reaction enthalpies given below to determine AH°rxn for the following reaction: P4(g) + 10 Cl₂(g) → 4 PC|5(s) PC15(s) → PC13(g) + Cl₂(g) P4(g) + 6 Cl₂(g) → 4 PCl3(g) rxn IF7(g) IF 5(9) 2(g) 62.42 = ? ΔΗ° rxn AH°rxn = +157 kJ = -1207 KJ QUESTION 13 Use the AH°f and AH°rxn information provided to calculate AH°f for IF: IF7(9) + 12(g) → IF5(g) + 2 IF(g) AH°rxn = -89 kJ

Given: 4AI(s) + 302(g) 2A1203(s) AH° = -3,340 kJ Determine AH for the reaction: 2AI(s) + 3/½02(g) Al203(s) O A. 6,680 kJ O B. -6,680 kJ O C. 1670 kJ O D. -1,670 kJ II