Enthalpy of combustion of carbon to CO 2 is –393.5 kJ mol –1 . Calculate the heat released upon formation of 35.2 g of CO 2 from carbon and dioxygen gas.

Question

Philoid · Accepted Answer

Given: Enthalpy of combustion of carbon (ΔH) = –393.5 kJ mol^–1.

Mass of CO₂ = 35.2g

Molar mass of CO₂ = 12 + 2× 16

= 44 g/mol

∴ 1 mol of carbon = 44g

Heat released when 44g CO₂ is formed = 393.5 kJ

Heat released when 35.2g CO₂ is formed = × 35.2g

⇒314.8 kJ

Thus, heat released when 35.2g CO₂ formed is 314.8 kJ

Enthalpy of combustion of carbon to CO2 is –393.5 kJ mol–1. Calculate the heat released upon formation of 35.2 g of CO2 from carbon and dioxygen gas.

Enthalpy of combustion of carbon to CO₂ is –393.5 kJ mol^–1. Calculate the heat released upon formation of 35.2 g of CO₂ from carbon and dioxygen gas.