KVPY SA Exam 19-Nov-2017 Question Paper

Question : 67 of 80

Marks: +1, -0

Two different liquids of same mass are kept in two identical vessels, which are placed in a freezer thatextracts heat from them at the same rate causing each liquid to transform into a solid. The schematic figurebelow shows the temperature T vs time t plot for the two materials. We denote the specific heat of metrials inthe liquid (solid) states to be

C_{L1} (C_{S1}) \and C_{L 2} (C_{S2})

respectively.

$C_{L1} < C_{L2} \and C_{S1} < C{S2 }$
$C_{L1} > C_{L2} \and C_{S1} > C{S2 }$
$C_{L1} > C_{L2} \and C_{S1} < C{S2 }$
$C_{L1} < C_{L2} \and C_{S1} > C{S2 }$

Validate

Solution:

Let Refrigerater extract Q joul/per second
Q.t ⇒ ms (T

_\f

– T)
Higher the specific heat, Higher the slope

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