Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

what is the difference between latent heat & latent heat of fusion?
Asked by sofizeeshan | 29 Apr, 2008, 09:41: PM
answered-by-expert Expert Answer

Two latent heats (or enthalpies) are typically described: latent heat of fusion (melting), and latent heat of vaporization (boiling). The names describe the direction of heat flow from one phase to the next: solid → liquid → gas.

The change is endothermic, i.e. the system absorbs energy, when the change is from solid to liquid to gas. It is exothermic (the process releases energy) when it is in the opposite direction. For example, in the atmosphere, when a molecule of water evaporates from the surface of any body of water, energy is transported by the water molecule into a lower temperature air parcel that contains more water vapor than its surroundings. Because energy is needed to overcome the molecular forces of attraction between water particles, the process of transition from a parcel of water to a parcel of vapor requires the input of energy causing a drop in temperature in its surroundings. If the water vapor condenses back to a liquid or solid phase onto a surface, the latent energy absorbed during evaporation is released as sensible heat onto the surface. The large value of the enthalpy of condensation of water vapor is the reason that steam is a far more effective heating medium than boiling water, and is more hazardous.

Answered by | 23 May, 2008, 09:43: AM
CBSE 9 - Chemistry
Asked by rubinapathan228 | 29 Jun, 2023, 05:45: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by shanuk98703 | 12 Apr, 2023, 09:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by yforyt3672 | 09 Apr, 2023, 07:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by sangeetha66599 | 25 Dec, 2022, 10:55: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by pranavtamboli65.9 | 02 Aug, 2022, 08:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by meghnahire17.9 | 17 Jul, 2022, 05:41: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by rajuvrajuraju3 | 17 Jul, 2022, 11:05: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by sanyaverma053 | 29 Jun, 2022, 10:55: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by ak0312581 | 07 Jun, 2022, 10:36: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by pinkgaurang | 30 May, 2022, 11:23: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×