Gay-Lussac's Law: Combining Volumes of Gases Lab Report (Lab Report Sample)

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Gay-Lussac's Law: Combining Volumes of Gases
Introduction
According to Avogadro's gas law, the volume of a gas is directly proportional to the number of constituent moles at constant temperature and pressure. One of the ways of mathematically expressing the law is shown below in equation (1).
k=vn-------(1)
In this case, k is a proportionality constant, while v and n represent the volume of the gas and the number of moles of the gas, respectively. Since the value of k is the same for all the ideal gases, the equation (1) can further be expressed as:
p1V1T1n1=p2V2T2n2------(2)
However, since the pressure and temperature are constant for an ideal gas, the equation (2) further reduces to:
V1n1=V2n2------(3)
Or
V1n2=V2n1-------(4)
Procedure
Part 1: Reaction of Gas A and Oxygen.
A plastic basin was filled approximately 2/3 of the way with room temperature tap water. Subsequently, a 100 mL graduated cylinder completely filled with water was clamped upside down in the basin as shown below in figure 1. The gases A and B were then pumped one at a time using plastic syringes into the cylinders. Each set-up contained a pre-filled syringe of oxygen gas and an empty syringe. The latter was to be filled with gas A. Initially, the plunger was pulled with the hose beneath the water to fill the syringe with water. The water and trapped air were then expelled by pushing the plunger in while the syringe pointed up. By so doing, all the air was expelled from the syringe, thereby leaving the rubber tube filled with water.
Figure 1: An illustration of the laboratory set up