2. To compare the various states of matter in terms ofpotential and kinetic energy
3. Describe the significant events that happen along a heatingcurve.
You are watching: Is the evaporation of water endothermic or exothermic
4. Analyze a phase diagram.
vaporization condensationevaporation equilibrium vapor pressureboiling suggest heat the vaporization freezingpoint heat of fusionsublimation deposition heatingcurve phase diagram
Matter top top Earthexists as either liquid, solid, or gas. Other than water, many matterexists in a single phase (liquid, solid, or gas) but can be made to adjust phaseby including or deleting push or temperature.
Energy and also PhaseChanges
According to thekinetic-molecular theory, a substances phase is established by the balance the itskinetic and also intermolecular forces. What this means is the you deserve to convertmatter from one step to another by simply adding or deleting kinetic energy(heat). When attempting to recognize the phase alters it is important toremember what is developing in endo and exothermic reactions.
|liquid come gas - vaporization, by process of evaporation|
|solid come gas - sublimation|
|liquid come solid - freezing|
|gas to liquid - condensation|
|gas to solid - deposition|
Evaporation is again described by theKinetic-molecular theory. Once the kinetic energy of the molecules in aliquid end up being greater than the intermolecular attractions in between them,evaporation occurs.
|within a liquid, evaporation is always occurring come some degree at the surface of the liquid|
|Temperature and evaporation price are straight related|
|Liquids with high evaporation prices are claimed to it is in volatile - typically flammable as result of the visibility of essential materials and oxides|
|Evaporation cools a surface ar or systems by removed the molecules through the highest possible kinetic energy|
|Most services in a closed container space in liquid-vapor equilibrium|
|condensation and also evaporation prices are equal|
|price of molecules leaving the solution are equal to the molecule entering the liquid|
|The equipment is at equilibrium vapor pressure|
The boiling suggest of a liquid is directly relatedto the vapor push of the liquid. Vapor push is a measure up of thevapor present in a liquid. Once the vapor pressure equates to the atmosphericpressure cook occurs. It is essential to remember the vaporization isan endothermic procedure as heat is gotten rid of from the liquid v boiling.
|vapor press of a fluid is directly related come the temperature applied to the liquid|
|the boiling allude is straight related to the atmospheric press exerted ~ above the solution|
|boiling occurs when the vapor push = atmospheric pressure|
|the temperature the a liquid will remain consistent at the boiling suggest until every one of the liquid is vaporized.|
Freezing and Melting:
The freezing and also melting point out of a fluid existat the very same temperature and also represent an equilibrium between the fluid andsolid phases.
|melting and freezing points space not greatly influenced by atmospheric pressure|
|melting depends on the warmth of blend which like the boiling is one endothermic process|
|freezing provides the same amount of energy as the warmth of fushion bu is an exothermic process|
The heater curve is a depiction of thephases the a substance compared to the temperature and internal energy of asubstance. The blue lines represent the different phases that a substancewhile the red lines stand for the heats of fusion and vaporization.
See more: Eli5: Why Is Sparkling Water Bitter, Why Does Carbonated Water Taste So Bitter
|endothermic reactions move from left to appropriate as the commodities increase in kinetic energy and become less organized|
The phase diagram is another representation ofthe internal power of a substance contrasted with the pressure and also temperature ofits surroundings.
|temperature and pressure room inversely concerned the process of vaporization|
|pressure has small effect top top the melting and also freezing that a substance|
|the triple allude is a allude where all 3 phases occur in equilibrium|