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  4. Equal masses of two liquids A and B contained in vessels of negligible heat capacity are supplied heat at the same rate. The temperature-time graphs for the two liquids are shown. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/eabfeff4205cd8d6542eb13467122191-.png /> If S represents specific heat and L represents latent heat of liquid, then

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Q. Equal masses of two liquids $A$ and $B$ contained in vessels of negligible heat capacity are supplied heat at the same rate. The temperature-time graphs for the two liquids are shown.
image
If $S$ represents specific heat and $L$ represents latent heat of liquid, then

AIIMSAIIMS 2009

Solution:

As temperature of $A$ rises faster than temperature of $B$, therefore specific heat of $A$ is less than that of $B, S_{A}< S_{B}$.
Horizontal portions of graphs represent conversion of liquid into vapours.
Therefore, boiling point of $A>$ boiling point of $B$.
Therefore, $L_{A}>L_{B}$.