2.2. Thermal properties and temperature
A subsection of Physics, 5054, through 2. Thermal physics
Listing 10 of 295 questions
A hot steel rod is cooled by plunging it into cold water, as shown in . steel rod The steel rod has a mass of 2.0 kg and is initially at a temperature of 500 °C. It cools to 50 °C when placed in the water. The specific heat capacity of steel is 460 J / (kg °C). Calculate the thermal energy lost by the steel rod as it cools to 50 °C. thermal energy = A small mass of water boils when the rod is placed in the water. The remaining water then cools to room temperature and some of it evaporates. In both boiling and evaporation, water molecules escape into the air. State one way in which boiling is different from evaporation. The rate of evaporation decreases as the water cools. Explain why this happens, using ideas about molecules.
5054_s21_qp_21
THEORY
2021
Paper 2, Variant 1
View
Questions Discovered
295