Use average bond enthalpy (D) values available under the Thermochemistry heading on ACORN to calculate ΔrH for the following reaction: 2NH3 + 3Cl2 → N2 + 6HCl Express your answer to 3 significant figures.

What is the enthalpy of reaction for the following reaction: 2H₂O(g) → 2H₂(g) + O₂(g) Bond H-H O=O H-O Bond energy (kJ/mol) 436 499 460 VE ΑΣΦ ? kJ/mol

For the reaction below ΔH = -296 kJ per mole of SO2 formed. S(s) + O2(g) → SO2(g) (c) What quantity of energy is required to break up exactly 2 mol of SO2(g) into its constituent elements?

Consider the following chemical reaction: C3H8(g) + H2(g) to give C2H6(g) + CH4(g)      ΔH° = ?      Calculate the enthalpy change for the reaction above using Hess's law Thermochemical data: H2(g) + 1\2O2(g) to give H2O(l)           ΔH° =-285.8 kJ  ΔH° combustion for CH4(g)                    ΔH° =-890.0 kJ/mol CO2 giving C(s, graphite) + O2(g)         ΔH°= +393.5 kJ ΔH° combustion for C2H6(g)                    ΔH° =-1560.0 kJ/mol ΔH°f for C3H8(g)                                    ΔH° =-103.8 kJ/mol

Problem 10 An electrochemical cell utilizes the following redox process at 25°C: Sn"(aq) + X(s) → Sn(s) + X"(aq), X(s)|x2* (aq, 1 M)||Sn2* (aq, 1 M|Sn(s) Where X symbolizes some metal. The standard galvanic cell potential (standard emf) is: Eel = 0.14 V. What is the standard reduction half-cell potential, E°, if E° 2+ Sn"/Sn = - 0.14 V? "cell Enter your answer in the box provided with correct units and sig. fig.: The standard reduction half-cell potential E°. 2+ Answer: for X is

What is the enthalpy change, Delta Hrxn, for the following reaction?       2 NaOH (s) + CO2 (g) → Na2CO3 (s) + H2O (l)