Gas is one of aggregate states of many substances. Let's say water: at the room temperature it reminds gas a little, it is liquid, but once you break a temperature barrier in 100 degrees Celsius with a normal atmospheric pressure, and it will turn into gaseous state. All of us live in the atmosphere of gas, air - mix of nitrogen and oxygen necessary for breath - too gas, but if strongly to lower temperature, it will become liquid. Besides the listed substances there is a huge amount of various gases.
It is required to you
- - current source
- - heating element
- - water
- - food salt
- - sulfuric acid or salt
- - acetic acid
- - sodium acetate
- - caustic soda
Instruction
1. Hydrogen is the combustible gas which is the easiest element. When it burns in air, connecting to oxygen, forms water. It can easily be received from water in house conditions by means of electrolysis. In capacity, it is desirable divided into two compartments (cathode and anode space) water with the food salt dissolved in it (salt is necessary for increase in conductivity) is poured, two electrodes are located, and on them constant tension moves. The current passing through solution forms on the cathode hydrogen, and on the anode chlorine. Still hydrogen can be received, placing, for example, a zinc piece in the diluted sulfuric or hydrochloric acid.
2. One more combustible gas - methane - can be made if to heat mix from caustic soda and the concentrated acetic acid. Only condition: it is necessary that acetic acid was waterless and caustic soda was dry i.e. that there was no water presence. There is still a similar way of receiving methane: it is necessary to alloy sodium acetate everything with the same caustic soda, methane will be emitted at the same time and to be formed the calcinated soda.