Relate temperature in kelvin to the average kinetic energy of particles, convert between the Celsius and Kelvin scales, and interpret heating and cooling curves where temperature stays constant during a change of state.
Tę umiejętność sprawdzają 4 zadania wzorowane na arkuszach IB z lat 2023–2025.
The amount of NO2 prepared was checked by titration. The gas was first absorbed in water: 2 NO2(g) + H2O(l) → HNO3(aq) + HNO2(aq) The resulting solution was made up to 200.0 cm3 in a volumetric flask, and 20.0 cm3 portions…
An ideal gas is held in a rigid, sealed container at 27 °C, where its pressure is P Pa. The container is then cooled to −3 °C. Which expression best describes the new pressure of the gas? A. Slightly less than P B. Slightly more than P C. One ninth of…
What happens as a pure molecular solid, such as solid ammonia, melts at its melting point? I. The temperature of the sample stays constant. II. The energy absorbed is used to partly overcome the forces between the particles. III. Covalent bonds within the…
The temperature of a sample of gas is raised from 27 °C to 177 °C. By what factor does the average kinetic energy of the gas particles change? A. 1.2 B. 1.5 C. 2.25 D. 6.6
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