Calculate the Enthalpy Change at 298 $\Delta_{\mathrm{f}} H_{208}^{\circ}$ Data in Appendix 7:
SiCl₄ (L) + 2H₂O (L) →

Calculate the enthalpy change at 298.15 K and 1 bar pressure for the following reaction, using $\Delta_{\mathrm{f}} H_{208}^{\circ}$ data in Appendix 7:
SiCl₄ (l) + 2H₂O (l) → SiO₂ (s) + 4 HCl (g)

A) + 30.4 kJ mol^-1.
B) - 30.4 kJ mol^-1.
C) + 21.5 kJ mol^-1.
D) - 21.5 kJ mol^-1.