Pankaj Bhatt Solutions for Chapter: Calorimetry, Exercise 2: QUESTIONS

$20 \text{g}$ of ice and $200 \text{g}$ of water at $0°\text{C}$ is put in an electric kettle of rating $1 \text{kW}$. Assuming there is no energy loss, in how much time the water in the kettle starts boiling?

Describe a method to find latent heat of vaporisation of steam.

One kg of ice at $-10°\text{C}$ is heated to convert it into steam at $100°\text{C}$. Calculate the total amount of heat given in this process. Specific heat of ice$=0.5 \raisebox{1ex}{$\text{calorie}$}\!\left/ \!\raisebox{-1ex}{$\text{g°C}$}\right.$.

A copper calorimeter of mass $450 \text{g}$ contains $260 \text{g}$ of water at $20°\text{C}$. Steam at $100°\text{C}$ is passed in this water which is stirred well till final temperature becomes $35°\text{C}$. What is the final amount of water in the calorimeter? (Specific heat of water is $4.2 \mathrm{J}$)

In how much time an electric heater of $1200 \text{W}$ will convert $2 \text{kilogram}$ of water at $40°\text{C}$ into steam at $100°\text{C}$? Assume there is no heat loss in this process.

$40\text{ g}$ of ice at $0°\text{C}$ is mixed with $50 \text{g}$ of water at $40°\text{C}$. Explain why the final temperature of the water remains $0°\text{C}$. 

Steam at $100°\text{C}$ is passed in $10 \text{litres}$ of water at $10°\text{C}$ till it starts boiling. What is the final amount of boiling water $?$

On one winter night to prevent the crop from frost a clever farmer fills his field with water. Explain why?