Question 6 6.1 Calculate the enthalpy of the reaction 2NO (g) + O2(g)-2NO: (g), given the following reactions and enthalpies of formation: (i) 12 N₂(g) + O₂-NO: (g) (ii) 12 N₂(g) +120: (g) → NO(g) ΔΗ = 33.2 kJ ΔΗ = 90.2 kJ 6.2 The standard enthalpy of formation of NH3(g) at 298 K is equal to -462.11 kJ mol¹. Using the heat capacity data given below (valid for the temperature range of 298 K to 1600 K). Cpm (H₂) / J. K¹ mol¹ = 29.07-0.837 x 10³ +2.012 x 10 Cp.² (N₂) / J. K'¹ mol'¹ = 26.98 +5.192 x 10³-0.3376 x 10 C. (NH)/J.K¹ mol¹ = 25.89 +32.58 x 10³-3.046 x 10 Calculate the standard molar heat of formation of NH3 (g) at 900 K (in kJ.mol), at 1000 K. Give your final answer to 3 significant figures.

Given the following reactions and their enthalpies: AH(kJ/mol) H;(g) 2H(g) 20(g) +436 O:(g) +495 H,(g) + 0,(g) → H,O(g) -242 (a) Devise a way to calculate AH for the reaction H,O(g) - 2H(g) + O(g) (b) From this, estimate the H-O bond energy.

When 1.42 g of iron reacts with 1.80 g of chlorine, 3.22 g of iron(II) chloride (FeCl2, molar mass = 126.75 g/mol) and 6.8 kJ of heat is produced. What is the enthalpy change for the reaction when 1 mole of iron(II) chloride is produced? round to sig figs

Consider the following reactions: AH = -393.5 kJ (graphite) + 2 AH = -285.8 kJ 2(g) CH,OH + 3/2 0, +2H,0 AH = -726.4 k (1) Choose... Choose... -48.25 Calculate the enthalpy change for the following reaction: 188.7 + 2 H29) CH,OH -37.6 C (graphite) + V½ 0, 10.7 -238.7 39.0 268 11.85 Given the following information: N, bond energy = 941 kJ/mol, F, bond energy = 154 kJ/mol 2 N + 3/2 F AH = -103 kJ/mol 2(g) Choose... Calculate the N-F bond energy (kJ/mol) A ballon originally had a volume of 8.68 L at 258 K and a pressure of 575 mmHg. To what temperature (in K) must the balloon be cooled to reduce its volume to 5.00 L at a pressure of 730 mmHg? Choose... V