What is calorimetry ? What is calorimeter ? Explain its principle and construction.
What is calorimetry ? What is calorimeter ? Explain its principle and construction.
Calorimetry means measurement of heat.
A device in which heat measurement can be made is called calorimeter.
When there is no heat exchange between system and surroundings, then it is called isolated system.
When different parts of an isolated system are at different temperature, a quantity of heat
transfers from the part at higher temperature to the part at lower temperature. The heat lost by
the part at higher temperature is equal to the heat gained by the part at lower temperature.
When a body at higher temperature is brought in contact with another body at lower
temperature, the heat lost by the hot body is equal to the heat gained by the colder body,
provided no heat is allowed to escape to the surroundings.
Construction :
It consists a metallic vessel and stirrer of the same material like copper or aluminium.
The vessel is kept inside a wooden jacket which contains heat insulating materials like glass,
wool etc.
The outer jacket acts as a heat shield and reduces the heat loss from the inner vessel.
There is an opening in the outer jacket through which a mercury thermometer can be inserted
into the calorimeter.
Similar Questions
$100\,g$ of water is supercooled to $-\,10\,^oC$. At this point, due to some disturbance mechanised or otherwise some of it suddenly freezes to ice. What will be the temperature of the resultant mixture and how much mass would freeze ? $[S_W = 1\,cal\,g^{-1}\,^oC^{-1}$ and ${L^W}_{{\text{fussion}}}$ $= 80\,cal\,g^{-1}]$
$100\,g$ of water is supercooled to $-\,10\,^oC$. At this point, due to some disturbance mechanised or otherwise some of it suddenly freezes to ice. What will be the temperature of the resultant mixture and how much mass would freeze ? $[S_W = 1\,cal\,g^{-1}\,^oC^{-1}$ and ${L^W}_{{\text{fussion}}}$ $= 80\,cal\,g^{-1}]$
$1\,\, kg$ of ice at $-10^o C$ is mixed with $4.4\,\, kg$ of water at $30^o C$. The final temperature of mixture is ........$^oC$ (specific heat of ice is $2100\,\,J/kg/k$)
$1\,\, kg$ of ice at $-10^o C$ is mixed with $4.4\,\, kg$ of water at $30^o C$. The final temperature of mixture is ........$^oC$ (specific heat of ice is $2100\,\,J/kg/k$)
Calorie is defined as the amount of heat required to raise temperature of $1g$ of water by $1°C$ and it is defined under which of the following conditions
Calorie is defined as the amount of heat required to raise temperature of $1g$ of water by $1°C$ and it is defined under which of the following conditions
- [IIT 2005]
The temperature of $100 \,gm$ of water is to be raised from $24^{\circ} C$ to $90^{\circ} C$ by adding steam to it. The mass of the steam required for this purpose is ........... $g$
The temperature of $100 \,gm$ of water is to be raised from $24^{\circ} C$ to $90^{\circ} C$ by adding steam to it. The mass of the steam required for this purpose is ........... $g$
$300\, gm$ of water at $25°C$ is added to $100\, gm$ of ice at $0°C$. The final temperature of the mixture is........ $^oC$
$300\, gm$ of water at $25°C$ is added to $100\, gm$ of ice at $0°C$. The final temperature of the mixture is........ $^oC$