What does Q mL mean?
heat energy
Is Melting copper exothermic or endothermic?
No, heat has to be added to make copper melt. So that’s called an endothermic process. When copper freezes it releases heat, so that’s called exothermic.
Is cooking an egg exothermic?
Cooking an egg is an endothermic process because added energy makes it cooked. An egg without heats stays an (uncooked) egg. In this reaction, energy is absorbed. In an exothermic reaction, energy is released.
Is cooking an egg in a frying pan endothermic?
The endothermic reaction described is of cooking an egg. In the process, the heat from the pan is being absorbed by the egg, which is the process of it cooking, so therefore the end result is a cooked egg. If the egg did not absorb the heat, i.e. exhibit this endothermic reaction, the egg would not cook.
How do you know if its exothermic or endothermic?
An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings.”
Is freezing water endothermic or exothermic?
When water becomes a solid, it releases heat, warming up its surroundings. This makes freezing an exothermic reaction.
Is Freezing always exothermic?
Freezing is almost always an exothermic process, meaning that as liquid changes into solid, heat and pressure are released.
What are three examples of exothermic reactions?
Examples of Exothermic Reactions
- any combustion reaction.
- a neutralization reaction.
- rusting of iron (rust steel wool with vinegar)
- the thermite reaction.
- reaction between water and calcium chloride.
- reaction between sodium sulfite and bleach (dilute sodium hypochlorite)
- reaction between potassium permanganate and glycerol.
What are exothermic change give two examples?
The chemical reactions which proceed with the evolution of heat energy are called exothermic reactions. Examples: Carbon burns in oxygen to form carbon dioxide and heat energy is produced. Water added to quick lime (calcium oxide), slaked lime (calcium hydroxide) is produced with a lot of heat energy.