NEET Physics — Thermal Properties of Matter

What happens to the pressure of an ideal gas if its volume is halved and temperature is kept constant?

Which process describes the direct transition from solid to gas observed in iodine?

A $0.1 \, \text{kg}$ lead block at $500^\circ \text{C}$ is placed in $0.4 \, \text{kg}$ water at $26^\circ \text{C}$ in a $0.05 \, \text{kg}$ brass calorimeter at $26^\circ \text{C}$. What is the final temperature? (Specific heat of lead = $127.7 \, \text{J kg}^{-1} \text{K}^{-1}$, water = $4186 \, \text{J kg}^{-1} \text{K}^{-1}$, brass = $386 \, \text{J kg}^{-1} \text{K}^{-1}$)

A $0.2 \, \text{kg}$ brass block at $350^\circ \text{C}$ is placed in $0.5 \, \text{kg}$ water at $27^\circ \text{C}$ in a $0.1 \, \text{kg}$ iron calorimeter at $27^\circ \text{C}$. What is the final temperature? (Specific heat of brass = $386 \, \text{J kg}^{-1} \text{K}^{-1}$, water = $4186 \, \text{J kg}^{-1} \text{K}^{-1}$, iron = $450 \, \text{J kg}^{-1} \text{K}^{-1}$)

A $0.25 \, \text{kg}$ silver block at $150^\circ \text{C}$ is placed in $1 \, \text{kg}$ of water at $25^\circ \text{C}$ in a $0.2 \, \text{kg}$ aluminium calorimeter at $25^\circ \text{C}$. What is the final temperature? (Specific heat of silver = $236 \, \text{J kg}^{-1} \text{K}^{-1}$, water = $4186 \, \text{J kg}^{-1} \text{K}^{-1}$, aluminium = $900 \, \text{J kg}^{-1} \text{K}^{-1}$)