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

Given the following standard enthalpies of formation, which elements w

1.	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
Answer» C. C, Li and Cr

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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

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