Question

State the principle of calorimeter and define calorie and kilocalorie.

Answer 1

Principle of Calorimeter:
When a hot body is mixed or kept in contact with a oold body, there is a transfer of heat from hot body to oold body such that
Total heat gained by oolder body= Total heat lost by the hot body,
if there is no loss of heat to the surroundings.
One calorie is the quantity of heat required tD raise the temperature of 1 g of water by 1°C.
1 calorie= 4.186 joule
One kilocalorie is the quantity of heat required to raise the temperature of 1 kg of water by 1°C.
1 kcal= 4.186 x 10³ joule