Give an example of a chemical change that produces light and haeat.?

Answer 1

Some examples of chemical change:

• Burning a log of wood
• Mixing an acid with a base, producing water and a salt.
• Photosynthesis - a process in which carbon dioxide and water are changed into sugars by plants.
• Cracking heavy hydrocarbons to create lighter hydrocarbons (part of the process of refining oil).
• Cooking examples: cake, pancakes
• Oxidation examples: iron rusting or silver tarnishing
• Combustion
• Rotting of fruit
• Explosion of fireworks
• Lighting a match
• Digesting food
• Burning gas in a stove
• Oxidizing food for energy
• Roasting a marshmallow
• Burning a magnesium strip

Answer 2

Combustion is an example of a chemical change that produces both light and heat. For instance, when wood is burned, it undergoes combustion, producing light and thermal energy in the form of heat.

Answer 3

A combustion reaction.