Advertisements
Advertisements
Question
Advertisements
Solution
Although both ice cubes and iced water are at 0°C but ice cubes cool more quickly because each gram of ice requires additional 80 calories of heat to get converted into water at the same temperature, i.e., at 0°C. Hence, the cooling capacity of ice cubes is more than that of iced water.
APPEARS IN
RELATED QUESTIONS
Define heat capacity and state its SI unit.
A liquid X has the maximum specific heat capacity and is used as a coolant in Car Radiators. Name the liquid X.
Two metallic blocks P and Q of masses in ratio 2: 1 are given the same amount of heat. If their temperature rise by the same amount, compare their specific heat capacities.
Give one example where high specific heat capacity of water is used as cooling.
A piece of iron of mass 2.0 kg has a heat capacity of 966 J K-1. Find its specific heat capacity in S.I unit.
What is heat? What is the S. I. unit of heat?
The farmers fill their fields with water in winter. Give reason.
Solve the following problem.
What is the specific heat of metal if 50 cal of heat is needed to raise 6 kg of the metal from 20°C to 62 °C?
The diagram below shows a cooling curve for 200 g of water. The heat is extracted at the rate of 100 Js-1. Answer the questions that follow:
- Calculate specific heat capacity of water.
- Heat released in the region BC.
To study energy exchange between hot and cold objects, the system of both objects is isolated from the environment by keeping them inside ______.
