Calorimetry

A body of mass $10 \mathrm{kg}$ falls from a height of$25 \mathrm{m}$ and rebounds to a height of $0.50 \mathrm{m}$. If the loss in energy goes into heating the body, then the rise in temperature will be nearly: (specific heat of material is $25.2 \mathrm{J} {\mathrm{kg}}^{-1} {\mathrm{K}}^{-1}$)

Below is a graph between change in internal energy and temperature for a system placed in a constant volume.

The slope of the graph is known as

Which one of the following material will expand maximum if the same amount of heat energy is given to them?

$210 \mathrm{J}$ of energy supplied to $5 \mathrm{g}$ of water will raise its temperature by nearly

Two beakers $A$ and $B$ contain liquids of mases $300 \mathrm{g}$ and $420 \mathrm{g}$ respectively and specific heats $0.8 \mathrm{cal} {\mathrm{g}}^{-1} °{\mathrm{C}}^{-1}$ and $0.6 \mathrm{cal} {\mathrm{g}}^{-1} °{\mathrm{C}}^{-1}$. The amount of heat on them is equal. If they are joined by a metal rod

Three identical silver cups $A,B$ and $C$ contain three liquids of same densities at same temperature higher than the temperature of the surrounding. If the ratio of their specific heat capacities is $1:2:4$, then

If the heat given to raise the temperature of two solid spheres of radius $r_1$ and $r_2\left(r_2=1.5r_1\right)$ and density ${\rho }_1$ and ${\rho }_2\left({\rho }_1=0.75{\rho }_2\right)$ through $1°\mathrm{C}$ is same, then the ratio of their specific heat capacity is:

In a certain system of units, the fundamental unit of mass is taken as $2 \mathrm{kg},$ unit of length is taken as $\frac{1}{2} \mathrm{m},$ unit of time taken as $4 \mathrm{s}$ and unit of temperature is taken as $2$ Kelvin. In this system. $1$ unit of specific heat capacity will be (specific heat capacity is given by $s=\frac{Q}{m\times \Lambda T}.$ Where $Q$ is heat, $m$ is mass and $\Delta T$ is change in temperature) :-

Why the container of calorimeter is made up of copper?

Define calorimetry.

The SI unit of specific heat capacity is joule per kelvin per kilogram.

Define specific heat capacity with unit.

The SI unit for heat capacity is joule per kelvin.

Define heat capacity with unit.

If$x$ calories of heat are supplied to $15 g$ of water, its temperature rises from $20°C$ to $24°C.$ If specific heat for water is $1 cal g^{–1} °C^{–1}$, then the value of$x$is

Equal masses of three liquids $A,B and C$ have temperatures $10°\mathrm{C},25°\mathrm{C} and 40°\mathrm{C}$ respectively. If $A and B$ are mixed, the mixture has a temperature of $15°\mathrm{C}$. If $B and C$ are mixed, the mixture has a temperature of $30°\mathrm{C}$. If $A and C$ are mixed, then the mixture will have a temperature in $°\mathrm{C}$

Two different liquids of same mass are kept in two identical vessel, which are placed in a freezer that extracts heat from them at the same rate causing each liquid to transform into a solid. The schematic figure below shows the temperaure $T$ vs time $t$ plot for the two materials. We denote the specific heat in the liquid states to be $C_{L1}$ and $C_{L2}$ for materials $1$ and $2$ respectively, and latent heats of fusion $U_1$ and $U_2$ respectively.

Choose the correct option.

Ice melts when energy in the form of ____ is supplied

200 g water is heated from ${40}^{\mathrm{ o}}\mathrm{C}$ to ${60}^{\mathrm{ o}}\mathrm{C}$ . Ignoring the slight expansion of water, the change in its internal energy is close to (Given specific heat of water $=4184$ J/kg/K):

A current carrying wire heats a metal rod. The wire provides a constant power $\left(\mathrm{P}\right)$ to the rod. The metal rod is enclosed in an insulated container. It is observed that the temperature $\left(\mathrm{T}\right)$ in the metal rod changes with time $\left(\mathrm{t}\right)$ as:

$\mathrm{T}\left(\mathrm{t}\right)={\mathrm{T}}_0\left(1+\mathrm{\beta }{\mathrm{t}}^{1/4}\right)$

where $\mathrm{\beta }$ is a constant with appropriate dimension while ${\mathrm{T}}_0$ is a constant with dimension of temperature. The heat capacity of the metal is: