Methane,CH₄,reacts with oxygen to produce carbon dioxide,water,and heat. CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l)
ΔH = −890.3 kJ
What is the value of ΔH if 5.00 g of CH₄ is combusted?

Question

Methane,CH₄,reacts with oxygen to produce carbon dioxide,water,and heat. CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(l) ΔH = −890.3 kJ What is the value of ΔH if 5.00 g of CH₄ is combusted?

Quizplus · Accepted Answer

The molar mass of CH4 (methane) is approximately 16.04 g/mol. For 5.00 g of CH4, the number of moles is 5.00 g / 16.04 g/mol ≈ 0.312 moles. The given ΔH is for 1 mole of CH4, so for 0.312 moles, ΔH = −890.3 kJ/mol * 0.312 ≈ −277 kJ.

Methane,CH4,reacts with Oxygen to Produce Carbon Dioxide,water,and Heat

Methane,CH₄,reacts with Oxygen to Produce Carbon Dioxide,water,and Heat