Total Bond Energy Flashcards | Quizlet Is the reaction exothermic or endothermic? The forward reaction above is exothermic. It is a dynamic state, where both forward and reverse processes continue with equal rates. A: Energy involved in the bonds breaking is greater than that of the bonds forming. the number of gaseous particles increase leading to a more disordered state. This means if you know relatively how strong the bonds or how much energy it takes to form each of the molecules then you can know whether the reaction is endo or exothermic. Answer:The value of the equilibrium constant, Kc, for the reaction H2(g) + I2(g) ⇔ 2HI (g) at 448°C is 50.5. deekshi65 deekshi65 01.12.2020 Chemistry Secondary School answered H2 + I2 ⇌ 2HI is an example for 2 See answers . b. General Chemistry: Principles and Modern Applications . -----> Reaction Coordinate . ⇌. H2(g) + I2(g) -----> 2HI(g) (a) A hydrogen molecule and iodine molecule approach each other. (2 marks) (b) Propose the two elementary steps for this reaction based on the energy profile and state the intermediate. H2+I2----> 2HI equilibrium shift - CHEMISTRY COMMUNITY Use the chemical equation and the bond diagram to answer the question. What is the change in enthalpy for the following reaction: HI(g) ? The Position of Equilibrium - wikifoundryattachments.com H2(g) + I2(g) 2HI(g) If we add some H2 to a flask containing this mixture at equilibrium, [H2] will immediately increase. 2 CO (g) + O2 (g) --> 2 CO2 (g) + 566.0 kJ ΔH =566 kJ Reactants Products reaction --> PE --> An energy level diagram. polisen varberg händelser - universalcleaningltd.co.uk For myself, when I discuss this concept with students I like to write the chemical equation (in a generic way) as exothermic or endothermic. What is the total energy of the reaction? 4 Exothermic and endothermic reactions 1) Combustion of fuels: • The most common example is the oxidation of methane forming carbon dioxide and water: CH 4(g) + 2O 2(g) à CO 2(g) + 2H 2O (g) DH = - 890 Kj mol-1 • The negative sign means that the reaction is exothermic. Ea = 139 kJ/mol a) b, c) (2 marks) (b) Propose the two elementary steps for this reaction based on the energy profile and state the intermediate.