Exploring Gas Laws

[Name of the Institute]

Exploring Gas Laws

Introduction

The paper proposes a new method of teaching experiment on the gas laws. It is based on the use of automated measuring stand and management programs for monitoring the conditions of the experiment and collect data. Complete automation of measurement and control booth opens new methodological possibilities and opportunities for distance learning. In the traditional method of teaching chemistry equations that are derived not from the basic equation of the ILC, and determined experimentally, so the study of the subject, attach great importance to the demonstration and laboratory experiments1. Demonstrations in studying gas laws are executed, usually with the use of the following equipment: bellows demo gauge, thermometer (or a semiconductor temperature sensor), a glass jar, which is placed bellow. Experiment with the use of the listed equipment complies with visibility, visibility, credibility, reliability, however, he has a number of drawbacks: 1) for demonstrations we need ice or snow, hot water, which requires a certain amount of time to prepare the experiments, 2) the temperature is measured through the study of the gas in the bellows, and the environment in which it is placed, which can to some extent reduce the credibility of the experience, and 3) a significant amount of time in the implementation described demonstrations linked to mathematical treatment of the results of measurements.

Procedures

We propose to study the gas laws to use a specialized automated test stand, which does not require the setup and account for any other physical quantities, except pressure, volume and temperature of the gas. It can be applied when working chemistry laboratory, and to demonstrate the principle processes in gases. The design of the stand are two fundamental unit - the thermostat in which the syringe with the test gas (Wednesday the experiment) and a control actuator piston syringe. Figure below shows the experiment Wednesday, consisting of a thermostat which is a glass container in the shape of cuboids, a tight-fitting lid. The thermostat can be filled with liquid or air2. Oven temperature is controlled by an external sensor. In the thermostat placed medical syringe with a movable piston in which the test gas (air).

Figure: 1 Thermostat of the experiment

Also placed inside the syringe gas heating system (Figure 2) consisting of a heating coil and fan required for continuous mixing of heated air to ensure a constant temperature throughout the volume of the gas. Temperature of the sample gas is controlled by an internal temperature sensor (thermostat). Nose syringe connected to a pressure transducer.

Figure 2: Gas Heating System

The volume of the sample gas can be changed by a movable piston. It's the movement and position control (volume) by the piston drive unit shown in Figure 3.

Figure 3: Block Piston Drive

The piston is driven by a DC motor connected to a gear box (Figure 4).

Figure: 4 Motor with Gear Box

To control the position of the piston is used sensor (Figure 5), which is a variable resistor. Since the diameter of the syringe is constant, the program process ...