Determine the heat of reaction (ΔHrxn) for the process by which lead (II) chloride (PbCl2) is formed from its elements: Pb (s) + Cl2 (g) → PbCl2 (s)

by using the following thermochemical data:

Pb (s) + 2 Cl2 (g) → PbCl4 (l) ΔH = - 329.3 kJ

PbCl2 (s) + Cl2 (g) → PbCl4 (l) ΔH = + 30.1 kJ

the volume of fluid displaced would equal the volume of the gas. use a gas syringe - this is a laboratory instrument that can be used to withdraw a certain volume of gas from a closed system or to measure the volume of gas from a chemical reaction.

samuel de champlain. in 1608, king henry iv sponsored pierre dugua, sieur de mons and samuel de champlain as founders of the city of quebec with 28 men. this was the second permanent french settlement in the colony of canada.

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."