Tamil Nadu Board Solutions for Chapter: Heat, Exercise 1: textbook exercises

Define thermal capacity.

Define specific latent heat capacity.

Explain convection in daily life.

What are the changes in state of water? Explain.

How can you experimentally prove water is a bad conductor of heat? How is it possible to heat water easily while cooking?

What is the heat in joules required to raise the temperature of $25$ grams of water from $0 °\mathrm{C}$ to $100 °\mathrm{C}$? What is the heat in Calories? (Specific heat of water $=4.18 \raisebox{1ex}{$\mathrm{J}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{g} °\mathrm{C}$}\right.$)

What could be the final temperature (in $°\mathrm{C}$) of a mixture of $100 \mathrm{g}$ of water at $90 °\mathrm{C}$ and $600 \mathrm{g}$ of water at $20 °\mathrm{C}$?

How much heat energy (in joules) is required to change $2 \mathrm{kg}$ of ice at $0 °\mathrm{C}$ into water at $20 °\mathrm{C}$?
(Specific latent heat of fusion of water $=334000 \mathrm{J} {\mathrm{kg}}^{-1}$, Specific heat capacity of water$= 4200 \mathrm{J} {\mathrm{Kg}}^{-1} {\mathrm{K}}^{-1}$)