Problem: 4Al(s) + 3 O2(g)→2Al2O3(s) q=-3351kJ is ____ and therefore heat is ______ by the reaction.

FREE Expert Solution

Given: 4Al(s) + 3 O2(g)→2Al2O3(s) q=-3351kj

Recall that:

Exothermic reactions

lose energy, releases heat, temperature of the surroundings increases
▪ involves bond formation (for phase change: gas → liquid → solid)
ΔH is negative

Endothermic reactions

gain/requires energy, absorbs heat, temperature of the surroundings decreases
▪ involves breaking bonds (for phase change: solid → liquid → gas)
ΔH is positive


Analyzing process given:

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Problem Details

4Al(s) + 3 O2(g)→2Al2O3(s) q=-3351kJ is ____ and therefore heat is ______ by the reaction.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Endothermic & Exothermic Reactions concept. You can view video lessons to learn Endothermic & Exothermic Reactions. Or if you need more Endothermic & Exothermic Reactions practice, you can also practice Endothermic & Exothermic Reactions practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Ricardez's class at DELTA COLLEGE.