Practice Problem 1

Which of the following processes are run at constant volume and which are run at constant pressure?

(a) an acid-base titration

(b) decomposing CaCo₃ by heating limestone in a crucible with a bunsen burner

(c) the reaction bewteen zinc metal and an aqueous solution of Cu²⁺ ion to form copper metal and Zn²⁺ ions

(d) measuring the calories in a 1-oz. serving of breakfast cereal by burning the cereal in a bomb calorimeter

Answer

Processes (a), (b), and (c) are all run under conditions of constant pressure.   Only (d) is run at constant volume.