Heat is supplied to a certain homogeneous sam | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The horizontal parts of the heating curve represent phase changes where the temperature remains constant despite the continuous supply of heat. Th

Vedclass · Accepted Answer

Its latent heat of vaporization is greater than its latent heat of fusion.

Vedclass · Answer

(C) The horizontal parts of the heating curve represent phase changes where the temperature remains constant despite the continuous supply of heat. The length of these horizontal segments is proportional to the latent heat required for the phase change.$1$. In the provided graph,there is one horizontal segment representing a phase change (e.g.,melting or vaporization). However,looking at the slope of the temperature-time graph,the slope is given by $\frac{dT}{dt} = \frac{P}{ms}$,where $P$ is the power (rate of heat supply),$m$ is the mass,and $s$ is the specific heat capacity.$2$. Since $P$ and $m$ are constant,the specific heat capacity $s$ is inversely proportional to the slope $(s \propto \frac{1}{	ext{slope}})$.$3$. The graph shows a single sloping line. If we compare the latent heat segments (if multiple were present),we would compare their lengths. Given the options,we evaluate the latent heat of vaporization vs fusion. In standard heating curves for substances like water,the latent heat of vaporization is significantly larger than the latent heat of fusion. Thus,the horizontal segment corresponding to vaporization is longer than the one for fusion. Therefore,the conclusion that the latent heat of vaporization is greater than the latent heat of fusion is correct.

Heat is supplied to a certain homogeneous sample of matter at a uniform rate. Its temperature is plotted against time,as shown. Which of the following conclusions can be drawn?

Similar Questions

$Assertion :$ Melting of a solid causes no change in internal energy.
$Reason :$ Latent heat is the heat required to melt a unit mass of a solid.

$A$ block of ice with mass $m$ falls into a lake. After impact,a mass of ice $m/5$ melts. Both the block of ice and the lake have a temperature of $0^{\circ}C$. If $L$ represents the latent heat of fusion,the minimum distance the ice fell before striking the surface is

$A$ solid cube having certain fixed melting and boiling points takes heat from some source. The variation of temperature $\theta$ of the cube with the heat supplied $Q$ is shown in the adjoining graph. The portion $BC$ of the graph represents the conversion of

$A$ block of ice at $-10\,^oC$ is slowly heated and converted to steam at $100\,^oC.$ Which of the following curves represents the phenomenon qualitatively?

$A$ quantity of heat required to change the unit mass of a solid substance,from solid state to liquid state,while the temperature remains constant,is known as

Vedclass Test Series

Exam Paper Generator

Online Exam Module