Chemistry

Problem

Two industrial steps are used to generate hydrogen gas. Step A CH₄(g) + H₂O(g) → CO(g) + 3 H₂(g)

\Delta H = +206\,\text{kJ}

Step B CO(g) + H₂O(g) → CO₂(g) + H₂(g)

\Delta H = -41\,\text{kJ}

What is the enthalpy change,

\Delta H

, in kJ, for the net process CH₄(g) + 2 H₂O(g) → CO₂(g) + 4 H₂(g)? a) +41 b) +247 c) +165 d) -165