Indicate whether each of the following experimental errors would result in an in
ID: 856664 • Letter: I
Question
Indicate whether each of the following experimental errors would result in an incorrectly larger or smaller calculated molar volume for CO2, or if it would have no appreciable effect on the calculated molar volume. Assume the procedure described in this module was used. Briefly explain your answers.
The mass will be determined by weighing a flask filled with air and then reweighing the same flask filled with CO2 gas. The CO2 gas will come from allowing a piece of solid CO2 to sublime in the said flask.
A. Too much Dry Ice was added to the flask
B. After determing the mass of the flask, stopper, and air, the student used a stopper with less mass than the original stopper when he weighed the CO2-filled flask.
Explanation / Answer
A.
Molar volume is defined as the volume of gas occupied per one mole of gas.
Mole is the ratio of mass and molar mass.
Therefore, as mass increased the number of moles of CO2 increased and the gas volume are also increased.
Thus, the volume to mole ratio remains constant. Hence, no aprreciable effect.
B.
This situation effects the mass of weighed CO2 inturn moles of gas. The weighed volume is increased.
Therefore, the molar volume will be larger than actual molar volume.