Answer to Question #320223 in General Chemistry for grey tyrant

Question

Enthalpy of Chemical Reaction- Thermochemical Equation

1. Write the thermochemical equation for the following reactions that occur at constant pressure:

a. Decomposition of mercuric oxide to mercury and oxygen gas requires 87. 1 kJ of heat

b. Combustion of hexane, to carbon dioxide and water, releases 3923.9 kJ heat

Answer 1

a. HgO(s) = Hg(s) + 1.5O₂(g) - 87.1 kJ

b. C₆H₁₄ + 9.5O2 = 6CO₂ + 7H₂O + 3923.9 kJ