experiments
1. Calibration curve of a thermometer using the laboratory mercury thermometer as a standard.
2. Measurement of specific heat capacity, e.g. of water or a metal by a mechanical or electrical method.
3. Measurement of the specific latent heat of fusion of ice.
4. Measurement of the specific latent heat of vaporisation of water.
In an experiment to measure the specific latent heat of vaporisation of water, a student used a copper calorimeter containing water and a sensitive thermometer.
The water was cooled below room temperature before adding dry steam to it.
The following measurements were recorded.
Mass of copper calorimeter = 34.6 g
Initial mass of calorimeter and water = 96.4 g
Mass of dry steam added = 1.2 g
Initial temperature of calorimeter and cooled water = 8.2 °C
Final temperature of calorimeter and water = 20.0 °C
How was the water cooled below room temperature? (6)
How was the steam dried? (6)
Describe how the mass of the steam was determined. (6)
Why was a sensitive thermometer used? (6)
Using the data, calculate the specific latent heat of vaporisation of water. (16)
(specific heat capacity of water = 4180 J kg–1 K–1; specific heat capacity of copper = 390 J kg–1 K–1)
Build a steam trap .... Built!