Solids expand on heating because ................

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10-1.Thermometry, Thermal Expansion and Calorimetry

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Solids expand on heating because ................

Kinetic energy of atom increases

Potential energy of atom increases

Total energy of atom increases

The potential energy curve is asymmetric about the equilibrium distance between neighbouring atoms

Solution

(d)

The expansion of solids can be well understood by potential energy curve for two adjacent atoms in a crystalline solid as a function of their inter nuclear separation (r).

At ordinary temperature : Each molecule of the solid vibrate about it's equilibrium position $P_1$ between $A$ and $B$ ( $r_0$ is the equilibrium distance of it from some other molecule)

At high temperature : Amplitude of vibration increase $( C \leftrightarrow$ Dand $E \leftrightarrow F )$.

Due to asymmetry of the curve, the equilibrium positions $\left( P _2\right.$ and $\left.P _3\right)$ of molecule displaced. Hence it's distance from other molecule increases $\left( r _2 > \right.$ $r _1 > r _0$ ) Thus, on raising the temperature, the average equilibrium distance between the molecules increases and the solid as a whole expands.

Standard 11

Physics

On heating a liquid of coefficient of cubical expansion $\gamma $ in a container having coefficient of linear expansion $\gamma /3,$ the level of liquid in the container will

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A pendulum clock keeps correct time at $0\,^oC$. The thermal coefficient of linear expansion of the material of the pendulum is $\alpha $. If the temperature rises to $t\,^oC$, then the clock loses per day by (in second)

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The coefficient of apparent expansion of a liquid when determined using two different vessels $A$ and $B$ are ${\gamma _1}$ and ${\gamma _2}$ respectively. If the coefficient of linear expansion of vessel $A$ is $\alpha $, the coefficient of linear expansion of vessel $B$ is

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$2\,g$ of steam condenses when passed through $40\,g$ of water initially at $25\,^oC$. The condensation of steam raises the temperature of water to $54.3\,^oC$, …….. $cal/g$ is the latent heat of steam ?

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$200\, g$ of a solid ball at $20\,^oC$ is dropped in an equal amount of water at $80\,^oC$. The resulting temperature is $60\,^oC$. This means that specific heat of solid is

normal

Solids expand on heating because ................

Solution

Similar Questions

On heating a liquid of coefficient of cubical expansion $\gamma $ in a container having coefficient of linear expansion $\gamma /3,$ the level of liquid in the container will

A pendulum clock keeps correct time at $0\,^oC$. The thermal coefficient of linear expansion of the material of the pendulum is $\alpha $. If the temperature rises to $t\,^oC$, then the clock loses per day by (in second)

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$2\,g$ of steam condenses when passed through $40\,g$ of water initially at $25\,^oC$. The condensation of steam raises the temperature of water to $54.3\,^oC$, …….. $cal/g$ is the latent heat of steam ?

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