The latent heat of vaporization is higher than the latent heat of fusion since gas molecules have the
largest intermolecular space
and the force of attraction between the molecules is almost negligible. Therefore, more energy is required to convert liquid to gas.
Why is the latent heat of vaporization for water so much higher than the latent heat of melting quizlet?
Why is the latent heat of vaporization so much greater than the latent heat of melting?
From solid to liquid only requires SOME hydrogen bonds to be broken while liquid to gas must have ALL hydrogen bonds broken which requires more energy
. C.C. 5.3.
Why is heat of vaporization for water so much larger than the heat of fusion of ice?
Notice that for all substances, the heat of vaporization is substantially
higher than the
heat of fusion. Much more energy is required to change the state from a liquid to a gas than from a solid to a liquid. This is because of the large separation of the particles in the gas state.
Why is waters latent heat so high?
Water forms fairly strong bonds with itself, for a liquid, and so has a
very exothermic (negative) heat of condensation
. In reverse this gives it a very high heat of vaporisation: a lot of energy is required to turn it into a gas.
Which of the following best defines latent heat?
latent heat, energy absorbed or released by
a substance during a change in its physical state
(phase) that occurs without changing its temperature.
Which of the following is true about latent heat?
The correct answer is option 3 i.e a, c and d. Concept: Latent Heat is
an amount of heat absorbed by a unit mass of the substance to change its state without change of temperature
.
Does water have a high latent heat of vaporization?
That is,
water has a high heat of vaporization
, the amount of energy needed to change one gram of a liquid substance to a gas at constant temperature. … In humans and other organisms, the evaporation of sweat, which is about 99% water, cools the body to maintain a steady temperature.
What is the latent heat of vapourisation of water?
Hint: Latent heat of vaporization is defined as the heat required to change 1 mole of liquid substance into gaseous form under standard atmospheric pressure. The value of heat of vaporization of water is equal to
40.8KJ/mol
.
What does a heating curve look like?
A heating curve graphically represents
the phase transitions that a substance undergoes as heat is added to it
. The plateaus on the curve mark the phase changes. The temperature remains constant during these phase transitions.
What substance has the highest latent heat?
The magnitude of the latent heat is a measure of how strongly bound the molecules are to one another in the liquid and solid states. Note in the table above that
water
has the highest latent heat of vaporization. The next highest is ammonia, NH
3
, which is similar in many ways to water, H
2
O.
Which refrigerant has highest latent heat?
Ammonia
is toxic and flammable unlike Freon. Steel tubes are used for ammonia systems and copper tubes are used for Freon systems. The advantage of using ammonia is that it has a much higher latent heat of vaporization.
What is the latent heat of steam?
As the latent heat of steam at atmospheric pressure is
2257 kJ/kg
the amount of flash steam produced will be 299/2257 = 0.133 kg/kg of condensate.
What are three types of latent heat?
- Latent Heat of Fusion,
- Latent Heat of Vaporization,
- Latent Heat of Sublimation.
What are two types of latent heat?
Two common forms of latent heat are
latent heat of fusion (melting) and latent heat of vaporization (boiling)
. These names describe the direction of energy flow when changing from one phase to the next: from solid to liquid, and liquid to gas.
What is the purpose of latent heat?
The latent heat of fusion is
the heat required for an object to go from the solid state to the liquid state, or vice versa
. Since its value is generally much higher than specific heat, it allows you to keep a beverage cold for much longer by adding ice than simply having a cold liquid to begin with.
Is latent heat independent of volume?
⇒ Latent heat is
independent of volume
.
