Water of mass $m$ gram is slowly heated to increase the temperature from $T_1$ to $T_\gamma$. The change in entropy of the water, given specific heat of water is $1 \mathrm{Jkg}^{-1} \mathrm{~K}^{-1}$, is :
Using the given $P-V$ diagram, the work done by an ideal gas along the path $A B C D$ is :
Match the List - I with List - II
List - I | List - II | ||
---|---|---|---|
(A) | Pressure varies inversely with volume of an ideal gas. | (I) | Adiabatic process |
(B) | Heat absorbed goes partly to increase internal energy and partly to do work. | (II) | Isochoric process |
(C) | Heat is neither absorbed nor released by a system. | (III) | Isothermal process |
(D) | No work is done on or by a gas. | (IV) | Isobaric process |
Choose the correct answer from the options given below:
A gun fires a lead bullet of temperature 300 K into a wooden block. The bullet having melting temperature of 600 K penetrates into the block and melts down. If the total heat required for the process is 625 J , then the mass of the bullet is _______ grams. (Latent heat of fusion of lead $=2.5 \times 10^4 \mathrm{JKg}^{-1}$ and specific heat capacity of lead $=125 \mathrm{JKg}^{-1}$ $\left.\mathrm{K}^{-1}\right)$