고 Br

Br₂ HO 몸 Br-

Figure 7-3 (2) CI Br сон

Which of the following gases consist of molecules containing four or more atoms? Rn O NO O CO Ar Kr CO2 Хе H,S HF H, F, N, sO, Ne HCN Cl, NO, CH, Не Sa HCI MacBook Pro

The heat of formation at 25°C of liquid acetone, CH,C(0)CH,(1) is -247.5 kJ/mol. Which of the following is the correct heat of formation reaction for CH,C(O)CH,() )?

1:25 ul 4G ( Gym buddies HL_DP2.pdf Page 1 of 14 Section A 1. Which equation represents the bond enthalpy for the H-Br bond in hydrogen bromide? A. HBr(g)-H(g)+Br(g) B. HBr(g)-H(g)+Br(1) C. HBr(g)-H(g)+12B12(1) D. HBr(g)-H(g)+12B12(g) 2. Which process is endothermic? A. CH4(g)+202(g)-CO2(g)+2H2O(g) B. HCI(aq)+NaOH(aq)¬NaCI(aq)+H2O(I) C. CaCO3(s)-CaO(s)+CO2(g) D. H2O(g)-H20(1) 3. Hydrazine reacts with oxygen. N2Ha(l) + O2(g) → Na(g) + 2H2O(0) AH = -623 kJ What is the standard enthalpy of formation of NaH«(i) in kJ? The standard enthalpy of formation of H2O(1) is -286 kJ. A. -623 - 286 B. -623 + 572 C.-572 + 623 D. -286 + 623 4. Which statement is correct for this reaction? FezO3 (s) + 3CO (g) - 2Fe (s) + 3CO2 (g) AH = -26.6 kJ A. 13.3 kJ are released for every mole of Fe produced. B. 26.6 kJ are absorbed for every mole of Fe produced. C. 53.2 kJ are released for every mole of Fe produced. D. 26.6 kJ are released for every mole of Fe produced. 5. Which statements are correct? 1. The…

Plz help with hw Calculate the energy (in kJ/mol) that electrons acquire as a result of being accelerate through a potential of 80 V. (b) How does this energy compare to that of a typical chemical bond?

Estimate ΔrH° for forming 2 mol ammonia from molecular nitrogen and molecular hydrogen. Is this reaction exothermic or endothermic?

[References] Calculate AH for the reaction: 2NH3 (g) + O2(g) → N2H4 (1) + H2O(1) given the following data: 2NH3 (g) + 3N2O(g) → 4N2(g) + 3H2O(1) AH =–1010. kJ N2O(9) + ЗH2(9) — N;Ha (1) + Hа0(1) ДН %3D — 317 kJ N2H4 (1) + O2 (9) → N2(g)+2H20(1) ΔΗ--623 k.J На (9) + О2(9) — Н,0(1) AH = -286 kJ ΔΗ- kJ Submit Answer Try Another Version 3 item attempts remaining

The bond dissociation energy to break 4 C-H bond(s) in 1 mole of ethanol (CH₃CH₂OH) molecules is