Use the data below

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

Use the data below. (1) C(graphite) +

\tfrac{1}{2}

O_2(g) → CO(g) ΔH = –110 kJ (2) CO(g) +

\tfrac{1}{2}

O_2(g) → CO_2(g) ΔH = –280 kJ What is the enthalpy change, in kJ, for the reaction C(graphite) + O_2(g) → CO_2(g)? (a)

-110\,\text{kJ}

(b)

+390\,\text{kJ}

(c)

-390\,\text{kJ}

(d)

-170\,\text{kJ}