What is the enthalpy change when 22.5 g of CH₄ are burned in excess O₂?

Question

Quizplus · Accepted Answer

To solve this problem, we need to use the equation: CH₄ + O₂ → CO2 + H2O First, we need to balance the equation. The balanced equation looks like: 2CH₄ + 25O₂ → 16CO2 + 14H2O Next, we need to calculate the moles of CH₄: 22.5 g CH₄ × (1 mol CH₄/232.31 g CH₄) = 0.0969 mol CH₄ Now, we can use the balanced equation to determine the enthalpy change: 0.0969 mol CH₄ × (-1250 kJ/mol) = -121 kJ Therefore, the enthalpy change is -1250 kJ (Choice C).

What Is the Enthalpy Change When 22