Los cambios energéticos en las reacciones

The video explains exothermic and endothermic reactions, focusing on energy changes. Exothermic reactions release energy, as seen in combustion, while endothermic reactions absorb energy, like in thermal decomposition. The breakdown of sodium acid carbonate in baking is an example of an endothermic reaction. The video also discusses how breaking and forming chemical bonds involve energy changes, determining whether a reaction is exothermic or endothermic.

What is a common example of an exothermic reaction?

• Photosynthesis

• Combustion

• Evaporation

• Melting ice

Which type of reaction requires heat absorption to proceed?

• Combustion

• Neutralization

• Endothermic

• Exothermic

What happens to sodium acid carbonate in a cake at high temperatures?

• It remains unchanged

• It forms a new compound

• It breaks down into simpler substances

• It evaporates

What is required to break chemical bonds in a compound?

• No energy change

• Energy release

• Energy transfer

• Energy absorption

When is a reaction considered exothermic?

• When more energy is released than absorbed

• When more energy is absorbed than released

• When energy is neither absorbed nor released

• When energy is only absorbed