Difficult
What is latent heat of fusion? What is latent heat of vaporization? Give its value for water.
$1$. Latent heat of fusion: It is the amount of heat energy required to change $1 \ kg$ of a substance from solid state to liquid state at its melting point without any change in temperature.
$2$. Latent heat of vaporization: It is the amount of heat energy required to change $1 \ kg$ of a substance from liquid state to gaseous state at its boiling point without any change in temperature.
$3$. For water:
- Latent heat of fusion $(L_f)$ = $3.34 \times 10^5 \ J/kg$ (or $80 \ cal/g$).
- Latent heat of vaporization $(L_v)$ = $2.26 \times 10^6 \ J/kg$ (or $540 \ cal/g$).
$2$. Latent heat of vaporization: It is the amount of heat energy required to change $1 \ kg$ of a substance from liquid state to gaseous state at its boiling point without any change in temperature.
$3$. For water:
- Latent heat of fusion $(L_f)$ = $3.34 \times 10^5 \ J/kg$ (or $80 \ cal/g$).
- Latent heat of vaporization $(L_v)$ = $2.26 \times 10^6 \ J/kg$ (or $540 \ cal/g$).
Explore More
Similar Questions
$Assertion :$ Perspiration from the human body helps in cooling the body.
$Reason :$ $A$ thin layer of water on the skin enhances its emissivity.
$Reason :$ $A$ thin layer of water on the skin enhances its emissivity.
$A$ solid substance is at $30^{\circ}C$. To this substance,heat energy is supplied at a constant rate. The temperature versus time graph is as shown in the figure. The substance is in the liquid state for the portion of the graph:
Easy
View SolutionWhat is the process of changing the state of matter called?
Medium
View SolutionMatch the following according to conversion by heat:
Column-$I$ Column-$II$ $(a)$ Required heat to convert solid into gaseous. $(i)$ Latent heat of fusion $(b)$ Required heat to convert solid into liquid. $(ii)$ Latent heat of vaporization
| Column-$I$ | Column-$II$ |
|---|---|
| $(a)$ Required heat to convert solid into gaseous. | $(i)$ Latent heat of fusion |
| $(b)$ Required heat to convert solid into liquid. | $(ii)$ Latent heat of vaporization |
Easy
View SolutionWhat is latent heat? Explain with an example.
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo