Question 4 a. For the reaction, C(s) + 2H2(g) → CH4(g), Calculate the enthalpy change for the formation of methane(CH4) from solid carbon and hydrogen gas, given that CO₂(g) ΔΗ, =

- 393.5kJ H₂O(1) CO₂+ 2H₂O(1) C(s) + O2(g) 1 H2(g) + 1/2O2(g) 2 CH4(g) +202(g) 3 → ΔΗ2 = AH3 = Illustrate the above reaction with an energy level diagram - 285.8kJ - 890.3 kJ b.Calculate the amount of heat that is required to raise the temperature of 50.00mL of water from 25.52 °C to 28.75 °C. The density of water at this temperature is 0.997g/mL c.The standard enthalpy of formation of solid barium oxide BaO is 553.5kJ/mol and the enthalpy of formation of barium peroxide BaO₂ is 634.3kJ/mol 1. Calculate the standard enthalpy change for the following reaction and determine whether the reaction is exothermic or endothermic BaO2(s)→ BaO+ 1/2O2(g) 2. Draw an energy level diagram that shows the relationship between the enthalpy change of the decomposition of BaO₂ and O2 and the enthalpies of formation of BaO(s) and BaO₂ (s)