Pankaj Bhatt Solutions for Chapter: Calorimetry, Exercise 1: QUESTIONS

$500 \mathrm{cal}$ of heat is given to $100 \mathrm{g}$ of water at $35°\mathrm{C}$. What is the final temperature of water?

$80 \mathrm{g}$ of water at $90°\mathrm{C}$ is mixed with $160 \mathrm{g}$ of water at $20°\mathrm{C}$. What is the final temperature of mixture?

$20 \mathrm{g}$of kerosene oil at $40°\mathrm{C}$is mixed with $100 \mathrm{g}$ of water at $10 °\mathrm{C}$. What is the temperature of the mixture? Specific heat of kerosene $=0.5 \raisebox{1ex}{$\mathrm{cal}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{g} °\mathrm{C}$}\right.$.  

A small piece of iron of mass $250 \mathrm{g}$ is heated to temperature $90°\mathrm{C}$ and then put in a calorimeter of mass $400 \mathrm{g}$ containing $150 \mathrm{g}$ of water at $20 °\mathrm{C}$. What is the final temperature of mixture? Specific heat of iron$=0.12 \raisebox{1ex}{$\mathrm{cal}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{g} °\mathrm{C}$}\right.$ and of Calorimeter$=0.1 \raisebox{1ex}{$\mathrm{cal}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{g} °\mathrm{C}$}\right.$.
 

A solid of mass $300 \mathrm{g}$ is heated to a temperature $140 °\mathrm{C}$and then put in a calorimeter containing $200 \mathrm{g}$ of kerosene oil at $10 °\mathrm{C}$. If the mass of the calorimeter is $450 \mathrm{g}$ what is the final temperature of the mixture? Specific heat of solid$=0.12 \raisebox{1ex}{$\mathrm{cal}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{g} °\mathrm{C}$}\right.$. Specific heat of kerosene oil$=0.50 \raisebox{1ex}{$\mathrm{cal}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{g} °\mathrm{C}$}\right.$.

A calorimeter of heat capacity$40 \raisebox{1ex}{$\mathrm{cal}$}\!\left/ \!\raisebox{-1ex}{$°\mathrm{C}$}\right.$ contains $200 \mathrm{g}$ of water at $20 °\mathrm{C}$. A piece of metal of mass $400 \mathrm{g}$ is heated up to $250 °\mathrm{C}$ and put in the calorimeter. The temperature of mixture is obtained $75 °\mathrm{C}$. What is specific heat of metal?                                                                                      

A calorimeter of heat capacity $170\raisebox{1ex}{$ \mathrm{joule}$}\!\left/ \!\raisebox{-1ex}{$g°\mathrm{C}$}\right.$ contains $250 \mathrm{g}$ of liquid at $40 °\mathrm{C}$. A piece of metal of mass $300 \mathrm{g}$ is heated up to $200 °\mathrm{C}$ and put in the calorimeter. The final temperature of mixture is obtained $70 °\mathrm{C}$. If specific heat of metal is $0.42\raisebox{1ex}{$ \mathrm{joul}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{g} °\mathrm{C}$}\right.$, calculate the specific heat of the liquid. 
 

The figure given below shows a geographical phenomenon. Name this phenomenon and explain it in brief.