Question

In this experiment :

Set up the apparatus. The constant volume vessel is a 250-mL flat-bottomed flask and the water bath is a large cooking pot. Add a stirring magnet and a small amount of the drying agent CaCl₂ to the flask.

a constant volume vessel containing air will be attached to an electronic pressure sensor which will be used to measure the pressure of the gas as temperature increases.

A student does not have any drying agent in the round bottom flask, and does not stir the gas in the flask during the experiment. Would this have any effect on the experimental value obtained for the absolute zero? Explain.

Answer 1

Absolute zero is the lowest possible temperature and also lowest possible energy in the system, paramagnetism effect that is salts act as magnets when added in magneting filed, so by adding CaCl₂ this paramagnetism is created and energy of solids is reduced and brought to absolute zero , so here if stirring does not happen magnetic field is not created and if drying agent is not added it does not act as magnet in magnet field and does not decrease the energy of system thus it effects the experimental value for absolute zero.