Two substances A and B of equal mass m are heated at uniform rate of 6,cal,s^{-1} under similar cond

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10-1.Thermometry, Thermal Expansion and Calorimetry

normal

Two substances $A$ and $B$ of equal mass $m$ are heated at uniform rate of $6\,cal\,s^{-1}$ under similar conditions. A graph between temperature and time is shown in figure. Ratio of heat absorbed $H_A/H_B$ by them for complete fusion is

$9/4$

$4/9$

$8/5$

$5/8$

Solution

$\left(\frac{\mathrm{dQ}}{\mathrm{dt}}\right)_{\mathrm{A}}=\left(\frac{\mathrm{dQ}}{\mathrm{dt}}\right)_{\mathrm{B}}$

$\frac{\mathrm{H}_{\mathrm{A}}}{6-2}=\frac{\mathrm{H}_{\mathrm{B}}}{6.5-4}, \frac{\mathrm{H}_{\mathrm{A}}}{\mathrm{H}_{\mathrm{B}}}=\frac{4}{2.5}=\frac{8}{5}$

Standard 11

Physics

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normal

Two substances $A$ and $B$ of equal mass $m$ are heated at uniform rate of $6\,cal\,s^{-1}$ under similar conditions. A graph between temperature and time is shown in figure. Ratio of heat absorbed $H_A/H_B$ by them for complete fusion is

Solution

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