Classify each of the following as an exothermic or endothermic reaction:

1) 2h2(g)+o2(g)⟶δ2h2o(g)+483.6kj

2) 6co2(g)+6h2o(l)+15000kj⟶c6h12o6(aq) +6o2(g)

3) 2al(s)+fe2o3(s)⟶al2o3(s)+2fe(s)+850 kj

Answer;

1) 2H2(g)+O2(g)⟶Δ2H2O(g)+483.6kJ  - Exothermic

2) 6CO2(g)+6H2O(l)+15000kJ⟶C6H12O6(aq)+6O2(g)  - Exothermic

3) 2Al(s)+Fe2O3(s)⟶Al2O3(s)+2Fe(s)+850kJ - Exothermic

Explanation;Exothermic Reaction is a chemical reaction in which heat is given out is known as exothermic reaction, while, and endothermic Reaction is a chemical reaction in which heat energy is absorbed is known as endothermic reaction.The reaction between carbon dioxide and water is an example of an exothermic reaction. When most gases dissolve in solution, the process is exothermic meaning that heat is released as the gas dissolvesThe reduction of ferric oxide by aluminium is highly exothermic and therefore the iron formed will be in the molten state.

Ithe undersigned only for use your own email and delete any and copies and of the itself and to be there is a good timewhat does a decrease in temperature indicate about the molecules in a sample of liquid water? decreased chemical energy of the moleculesdecreased kinetic energy of the moleculesincreased chemical energy of the moleculesincreased kinetic energy of the moleculeshow does a sample of helium at 15 â°c compare to a sample of helium at 215 k? the helium at 15 â°c has a higher average kinetic energy than the sample at 215 k.the helium at 15 â°c has lower nuclear energy than the sample at 215 k.the helium at 15 â°c has slower-moving atoms than the sample at 215 k.the helium at 15 â°c has smaller atoms than the sample at 215 k.