Question

Choose the thermochemical equation that best illustrates ΔH°f (enthalpy of formations) for Li2SO4. A) 2 Li+(aq) + SO42-(aq) → Li2SO4(aq) B) 2 Li(s) + 1/8 S8(s, rhombic) + 2 O2(g) → Li2SO4(s) C) Li2SO4(aq) → 2 Li+(aq) + SO4 2-(aq) D) 8 Li2SO4(s) → 16 Li(s) + S8(s, rhombic) + 16 O2(g) E) 16 Li(s) + S8(s, rhombic) + 16 O2(g) → 8 Li2SO4(s)

Answer 1

(c) Li2SO4(aq) → 2Li+(aq) + SO4 2-(aq)

Explanation: Lithium atom donates electron to be more electropositive, while, sulphate ion accept electron to become more electronegative.