An ideal gas is defined as one in which all collisions between atoms or molecules are perfectly eleastic and in which there are no intermolecular attractive forces.
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- Heat of Combustion – The heat produced when one mole of a substance is completely burnt in excess oxygen.
- Heat of Formation – The heat change when one mole of a compound in its standard phase is formed from each of its elements in their standard phases.
- Heat of Reaction – The heat change when the numbers of moles indicated in the balanced equation for the reaction reacts completely.
- Heat of Neutralization – The heat change when one mole of H+ ions from an acid reacts with one mole of OH- ions from a base.
- Hess’s Law of Heat... (More)
To carry out flame tests with salts of lithium, sodium, potassium, barium, strontium and copper.
- Light a bunsen burner and adjust it to obtain a blue flame.
- Dip the wooden splint in water and add one of the salt to it so it sticks on.
- Place the wooden splint over the flame to observe the colour of the flame.
- After the salt has finished burning put the flame out and take note of the colour.
- Repeat this for all the different salts.
- Lithium – Deep red
- Sodium – Yellow
- Potassium – Lilac
- Barium – Green
- Strontium – Red... (More)
Ethene gas is prepared by dehydrating ethanol (drug found in alcoholic drinks). Ethene is a colourless gas with a sweet smell. It is a insoluble in water but can dissolve in organic solvents.
Main Chemicals required
- Ethanol – CH3CH2OH
- Aluminium oxide – a white powder in appearance – Al2O3
- Pour small amount of ethanol into a boiling tube.
- Push in a piece of glass wool to soaking up all the ethanol.
- Set up the apparatus with about 2g of aluminium oxide halfway along the boiling tube.
- Heat the aluminium oxide and occasionally heating the ethanol gently. The ethanol then... (More)