Activity 09
Read the experiment / scenarlo and answer the question.
All poured some distilled water in a beaker A and equal amount of sally water in a beaker B. He suspend
thermometer in both beakers and heat them equally for 2-3 minutes. Will temperature of beaker A and
Game or different. If different then write the reason for this difference.
Answers
ANSWER: In many of the experiments we do in Chemistry it is required that we measure the actual temperature of a liquid. On some occasions it is the temperature change which accompanies a reaction, that is required. The accuracy and precision of the thermometer are probably the main factors which affect such measurement, but good technique is also important to ensure that the true temperature is measured.
Most thermometers are calibrated so that they read correctly when the entire column of mercury is immersed in the solution whose temperature is being measured. It is not practical to do this every time a measurement is made, but we should at least have all the bulb covered, whenever measurements are made. The liquid should be well mixed to ensure a uniform temperature throughout its volume, and the thermometer should remain long enough in the liquid to ensure that it comes to thermal equilibrium at the temperature which is being measured.
In many of the experiments we do in Chemistry it is required that we measure the actual temperature of a liquid. On some occasions it is the temperature change which accompanies a reaction, that is required. The accuracy and precision of the thermometer are probably the main factors which affect such measurement, but good technique is also important to ensure that the true temperature is measured.
Most thermometers are calibrated so that they read correctly when the entire column of mercury is immersed in the solution whose temperature is being measured. It is not practical to do this every time a measurement is made, but we should at least have all the bulb covered, whenever measurements are made. The liquid should be well mixed to ensure a uniform temperature throughout its volume, and the thermometer should remain long enough in the liquid to ensure that it comes to thermal equilibrium at the temperature which is being measured.
Hope it's helpful