Is boiling water an exothermic or endothermic reaction?

Question

I believe it is an open system.

Answer 1

It is ENDOTHERMIC!! You need to put energy INTO the system to boil water!!! Freezing water is exothermic, since you take energy out of water to freeze it. And contrary to what someone said, it is not an exothermic process after it is boiling, it still requires heat input to convert the liquid to a gas.

Exo- and Endothermic are defined from the perspective of the system which is undergoing a change. So, from the boiling water's perspective, heat is coming in, meaning it is endothermic.

Answer 2

Exothermic Reactions With Water

Answer 3

It's an OPEN SYSTEM, because an open system is one in which mass or energy can be lost to or Gained from the environment and environment refers to surrounding or conditions. Saying its an ENDOTHERMIC process neglects the fact that heat is equally lost during boiling and evaporation, also saying that its an EXOTHERMIC process neglects the initial heating of the total system. It is both EXO and ENDO-THERMIC as both occurs in the system irrespective of the time it begins to occur. Chemist are smart enough to know that such systems could exist thats why the word OPEN SYSTEM is in existence today.

Answer 4

It is an Exothermic Reaction exothermic means producing heat endothermic means absorbing

Answer 5

It's both. After it reaches the boiling point, it's exothermic. Before it reaches the boiling point it's endothermic.

Answer 6

It's not a chemical reaction, it's a phase transition.

It is endothermic in the sense that you need to supply heat to water to convert it to water vapor.

Answer 7

it extremely is all relating to the path of warmth/potential pass between the "equipment" (i.e. despite it extremely is it is reacting) and our surroundings (i.e. each and every thing else, which you would be able to degree the temperature of). in an endothermic reaction, warmth flows from our surroundings to the equipment, increasing its inner potential. the temperature of our surroundings decreases. an exothermic reaction is the choice: potential flows from the equipment to our surroundings, increasing their warmth content. the temperature of our surroundings will develop. as an occasion, ice melting is endothermic (think of roughly what occurs once you place an ice cube on your drink). the choice technique, water freezing, is exothermic.

Answer 8

It is not a chemical reaction.

You can call it an endothermic PHYSICAL reaction.

Answer 9

exothermic

freezing water is endothermic