The value of ΔH° for the reaction below is +128.1 kJ: CH₃OH (l) → CO (g) + 2H₂ (g)
How many kJ of heat are consumed when 15.5 g of CH₃OH (l) decomposes as shown in the equation?

Question

Quizplus · Accepted Answer

The molar mass of CH₃OH is 32.04 g/mol. For 15.5 g of CH₃OH, the moles are 15.5 g / 32.04 g/mol = 0.484 moles. The reaction consumes 128.1 kJ per mole, so 0.484 moles × 128.1 kJ/mol = 62.0 kJ.

The Value of ΔH° for the Reaction Below Is +128