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10.1, thermonetry,thermal expansion and calorimetry — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics10.1, thermonetry,thermal expansion and calorimetry1 Mark
MCQ
Find the amount of heat supplied to decrease the volume of an ice water mixture by $1 \,\,cm^3$ without any change in temperature. $(\rho_ {ice} = 0.9 \rho_{water}, L_{ice} = 80 \,\,cal/gm).$ ......... $cal$
  • A
    $360$
  • B
    $500$
  • ✓
    $720$
  • D
    none of these
✓

Answer

Correct option: C.
$720$
c
$x$ gm ice convert into $x$ gm water

$\frac{x}{0.9}-x=1 \Rightarrow x=\frac{0.9}{0.1}=9$

$\therefore Q=9 \times 80=720 \mathrm{cal}$

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