Question

(a) Atmospheric temperature after a hailstorm is greater than the temperature during the hailstorm. State True or False.
(b) Which thermal physical quantity of a frying pan changes by making the base heavier?
(c) State the principle of Calorimetry.

Hint:

Remember the difference: Specific heat capacity is "per kg" of a substance, while heat capacity is for the "entire object". Heavier object = more heat capacity.

Answer 1

(a) True or False:
The statement is False. After a hailstorm, the hailstones on the ground start to melt. Melting is a process that requires energy, specifically the latent heat of fusion. The hailstones absorb this heat from the surrounding atmosphere, causing the atmospheric temperature to drop further. Therefore, the temperature after a hailstorm is generally lower, not greater.
(b) Thermal Physical Quantity:
Making the base of a frying pan heavier means increasing its mass (\(m\)). - Specific heat capacity (\(c\)) is an intrinsic property of the material and does not change with mass. - Heat capacity (or Thermal capacity, \(C'\)) is the product of mass and specific heat capacity (\(C' = m \times c\)). Since the mass (\(m\)) increases, the heat capacity also increases. The quantity that changes is the heat capacity.
(c) Principle of Calorimetry:
The principle of calorimetry, also known as the law of heat exchange, states that when two bodies at different temperatures are in thermal contact, the heat lost by the hotter body is equal to the heat gained by the colder body, provided there is no heat loss to the surroundings.
\[ \text{Heat Lost} = \text{Heat Gained} \]