2s = o 1044\n2co + o₂ → 2co₂ 2c≡o 2148\no = o 499\n4c = o 2956\nwhich reaction is endothermic?\n(1 point)\no…

2s = o 1044\n2co + o₂ → 2co₂ 2c≡o 2148\no = o 499\n4c = o 2956\nwhich reaction is endothermic?\n(1 point)\no s + o₂ → so₂\no 2co + o₂ → 2co₂\no n₂ + o₂ → 2no\no c + o₂ → co₂

2s = o 1044\n2co + o₂ → 2co₂ 2c≡o 2148\no = o 499\n4c = o 2956\nwhich reaction is endothermic?\n(1 point)\no s + o₂ → so₂\no 2co + o₂ → 2co₂\no n₂ + o₂ → 2no\no c + o₂ → co₂

Answer

Explanation:

Step1: Recall endothermic reaction concept

An endothermic reaction absorbs heat from the surroundings. Combustion reactions (reactions of elements with oxygen to form oxides like $S + O_2\rightarrow SO_2$, $2CO + O_2\rightarrow 2CO_2$, $C + O_2\rightarrow CO_2$) are exothermic as they release heat.

Step2: Analyze nitrogen - oxygen reaction

The reaction $N_2+O_2\rightarrow 2NO$ requires a significant amount of energy input (usually from high - temperature sources like lightning) to break the strong triple bond in $N_2$ and the double bond in $O_2$. It is endothermic.

Answer:

$N_2 + O_2\rightarrow 2NO$