Question

1. which of the following equations correctly shows the endothermic reaction for converting bauxite (aluminum ore) into aluminum? 2al₂o₃(s) + 3c(s) → 4al(s) + 3co₂(g) 2al₂o₃(s) + 3c(s) + heat → 4al(s) + 3co₂(g) 2al₂o₃(s) + 3c(s) → 4al(s) + 3co₂(g) + heat heat 2al₂o₃(s) + 3c(s) → 4al(s) + 3co₂(g)

Explanation:

An endothermic reaction requires heat input. In a chemical - reaction equation, heat is shown as a reactant for endothermic reactions.

Answer:

B. $2Al_2O_3(s)+3C(s) + \text{heat}
ightarrow4Al(s)+3CO_2(g)$