Chhattisgarh Board Solutions for Chapter: Heat and Temperature, Exercise 4: Questions for practice

The magnitude of heat absorbed by an object depends$-$

While sweating, contact with air makes us feel cool. Why?

When a gas-filled balloon is brought near the fire, it bursts. Why?

Write two uses of water expansion in daily life.

On what factors does the heat required by an object to increase its temperature depends?

Calculate how many $\mathrm{joules}$ of heat energy is required to increase the temperature of $0.5 \mathrm{kg}$ water from $25{}^{\circ }\mathrm{C}$ to $80{}^{\circ }\mathrm{C}$.

The specific heat capacity of water is $4184 J k{g}^{-1}°C^{-1}$ (Choose the value from $110560,115060,101560$)

Calculate how many joules of heat energy is required to increase the temperature of $12 \mathrm{kg}$ copper by $50{}^{\circ }\mathrm{C}$.

Specific heat capacity of copper $\left(s\right)=386 \mathrm{J} {\mathrm{kg}}^{-1} {}^{\circ }\mathrm{C}^{-1}$

The specific heat capacity of water is $4186 \mathrm{J} {\mathrm{kg}}^{-1}{}^{\circ }\mathrm{C}^{-1}$ and specific heat capacity of glass is $840 \mathrm{J} {\mathrm{kg}}^{-1}{}^{\circ }\mathrm{C}^{-1}$. If a glass heated at $80{}^{\circ }\mathrm{C}$ is kept in water at $80{}^{\circ }\mathrm{C}$. What will be the effect of temperature in both the cases ?