Physics Practical 19 Class 9, 10: Important Viva Voce Questions with Answers : To find the specific heat by the method of mixture using polystyrene cups (used as container of negligible heat capacity).
PRACTICAL 19 To find the specific heat by the method of mixture using polystyrene cups (used as container of negligible heat capacity). VIVA VOCE 1. What is the principle behind the method of mixtures for determining specific heat? Ans: The principle is based on the law of conservation of energy, where the heat lost by the hot substance is equal to the heat gained by the cold substance, assuming no heat is lost to the surroundings. 2. Why are polystyrene cups used as containers in this experiment? Ans: Polystyrene cups are used because they have negligible heat capacity and good thermal insulation properties, minimizing heat exchange with the surroundings. 3. What is specific heat capacity? Ans: Specific heat capacity is the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius. 4. Why is it important to ensure that the heat capacity of the container is negligible? Ans: Ensuring the heat capacity of the container is negligible helps