Enthalpy of combustion of carbon to carbon dioxide is -390 kJ/mol . What is the amount of heat released when 35 g of carbon dioxide is formed from the reaction of carbon and dioxygen gas?

Step-by-step solution

The combustion reaction of carbon is given by: C(s) + O₂(g) CO₂(g) The enthalpy of combustion is H = -390 kJ/mol . This means 390 kJ of heat is released when 1 mol of CO₂ is formed. Molar mass of CO₂ = 12 + 2 16 = 44 g/mol Number of moles in 35 g of CO₂ = 35 44 mol Amount of heat released = 35 44 390 kJ = 310.22 kJ 310 kJ Answer: 310 kJ