A fixed-volume container holds an unknown quantity of argon gas
CHEMISTRY · Multi-part · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A 0.0250m3 fixed-volume container holds an unknown quantity of argon gas. The pressure of the gas is measured at five different absolute temperatures:
Temperature T (K): 280 300 320 340 360
Pressure P (kPa): 92 99 106 112 119
(a) Using the data above, sketch a graph of pressure P (vertical axis) versus temperature T (horizontal axis). Draw a single straight best-fit line through the data points.
(b) Determine the numerical value of the slope of your best-fit line, including appropriate units.
(c) From the slope obtained in part (b), calculate the number of moles of argon contained in the vessel.
(d) Using your linear model, predict the pressure of the gas when its temperature reaches 400K. Give your answer to three significant figures.