question_answer

Given the following standard enthalpies of formation, which elements will react exothermically with \[Si{{O}_{2}}(s)\]  to make Si(s)?

Compounds	\[\Delta H_{f}^{o}kJ/mol\]
\[Si{{O}_{2}}(s)\]	- 910
\[MgO(s)\]	- 601
\[C{{r}_{2}}{{O}_{3}}(s)\]	- 1128
\[C{{O}_{2}}(g)\]	- 393
\[L{{i}_{2}}O(s)\]	- 598

A) Cr only

B) Mg and Li only

C) C, Li and Cr

D) Li only