Embibe Experts Solutions for Chapter: Thermal Properties of Matter, Exercise 1: TS EAMCET 2020 (9-Sep Shift-1)

A steel rod at $25°\mathrm{C}$ is observed to be $1 \mathrm{m}$ long when measured by another metal scale which is correct at $0°\mathrm{C}$. The exact length of steel rod at $0°\mathrm{C}$ is $\left({\alpha }_{\mathrm{steel}}=12\times {10}^{-6} °{\mathrm{C}}^{-1}, {\alpha }_{\mathrm{metal}}=20\times {10}^{-6} °{\mathrm{C}}^{-1}\right)$

The ratio of linear expansivity to the co-efficient of a real expansion of a rectangular sheet of a solid is

A metal ball initially at pressure of ${10}^5 {\mathrm{P}}_{\mathrm{a}}$ is heated from $20°C$ to $127°C$ keeping its volume constant. The coefficient of linear expansion of metal is ${10}^{-5}\left(°{\mathrm{C}}^{-1}\right)$ and bulk modulus of metal is $2\times {10}^{11} \mathrm{N} {\mathrm{m}}^{-2}$. The pressure inside the ball becomes

Latent heat of vaporisation of water is $22.6\times {10}^5 \mathrm{J} {\mathrm{kg}}^{-1}$. The amount of heat needed to convert $100 \mathrm{kg}$ of water into vapour at $100 °\mathrm{C}$ is