When boiling occurs, the more energetic molecules change to a gas, spread out, and form bubbles. … In addition, gas molecules leaving the liquid remove thermal energy from the liquid. Therefore the temperature of the liquid remains constant during boiling.
What happens to the temperature of a boiling liquid as heat continues to be added during the boiling process?
At the boiling point, temperature no longer rises with heat added because the energy is once again being used to break intermolecular bonds. Once all water has been boiled to steam, the temperature will continue to rise linearly as heat is added.
Why boiling point of a liquid remains constant although heat is continuously supplied to the liquid?
The temperature remains constant during boiling of water even though heat is supplied constantly because all the heat energy provided is used up in changing the state of water from liquid to gaseous water vapour.
Why does the temperature increases as the liquid is heated?
Heat. An increase in the temperature of a liquid causes an increase in the average speed of its molecules. As the temperature of a liquid increases, the molecules move faster thereby increasing the liquid’s kinetic energy.
Why does melting and boiling take place without temperature change?
The temperature does not change when melting or boiling, because this latent heat is used to break the bonds between the molecules. The latent heat of vaporisation is usually greater than the latent heat of fusion because normally, more bonds have to be broken when boiling than when melting.
Why does the temperature of the liquid decrease?
Since the kinetic energy of a molecule is proportional to its temperature, evaporation proceeds more quickly at higher temperatures. As the faster-moving molecules escape, the remaining molecules have lower average kinetic energy, and the temperature of the liquid decreases.
How does the temperature affect liquids?
In general, the liquids tend to expand when their temperature increases. For example, the same mass of boiling water occupies more volume at 100 degrees Celsius than at 20 degrees Celsius. Therefore, increasing temperature decreases density.
When heat is added to a liquid at the boiling temperature?
When energy is added to a liquid at the boiling temperature, its converts the liquid into a gas at the same temperature. In this case, the energy added to the liquid goes into breaking the bonds between the liquid molecules without causing the temperature to change.
Why does the temperature remain constant while melting?
The temperature of a substance remains constant during melting and boiling points till the completion of melting and boiling because of the latent heat of fusion used by the substances. The latent heat of fusion helps to overcome the force of attraction between particles of solid to change into a liquid when they melt.
Why does the temperature stay constant while the substance is melting and while it is boiling you answer should include one of the internal energies of the particles?
That is because when it reaches the boiling point or melting point , the substance starts changing into other state , for eg : water when reaches 100 C it starts melting ie changing it’s state so the temperature at that moment remains constant .
Why does temperature remain constant during change of state?
Reason: Temperature remains constant during change of state
It is due to the latent heat as the heat supplied to increase the temperature of the substance is used up to transform the state of matter of the substance hence the temperature stays constant.