Preparation Of Dihydrogen
Chapter Name : Hydrogen |
Sub Topic Code : 102_11_09_03_02 |
Topic Name : Preparation Of Dihydrogen |
|
Sub Topic Name : Commercial Preparation Of Dihydrogen |
|
Introduction
Hydrogen is the first element in the periodic table and is also the lightest element known. In the normal elemental form, it exists as a diatomic molecule.
Pre-Requisites:
Electrolysis of water, hydrocarbons
Activity:
Hydrogen is one of two important elements found in water (H2O).
Each molecule of water is made up of two hydrogen atoms bonded to one oxygen
atom.
Real Life Question:
Is hydrogen gas present in the atmosphere..?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| By the electrolysis of water | Electrolysis of acidified water using platinum electrodes gives hydrogen. |
| From hydrocarbons and coke | Hydrogen is obtained by the reaction of steam on hydrocarbons or coke at high temperatures. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Hydrogen gas (coolants) | Hydrogen gas is sometimes used for welding and as a coolant |
Real life uses :
Hydrogen is used as a hydrogenating agent to
produce methanol and convert unhealthy unsaturated fats and oils to saturated
fats and oils.
Places to visit :
blacksmith
Practical examples around us
| Examples | Explainations |
|---|---|
| Hydrogen as a fuel | Hydrogen is commonly used in the petroleum and chemical industries and is also widely used for many physics and engineering applications such as welding or as a coolant. |
What you learn in Theory:
Hydrogen can be produced from
different processes. Some of them are:
1.
By the electrolysis of water
2.
From
hydrocarbons and coke
3.
water-gas
shift reaction
What you learn in Practice:
Presently ~77% of the industrial dihydrogen is produced from
petro-chemicals, 18% from coal, 4% from electrolysis of aqueous solutions and
1% from other sources.