I got a couple of Chemistry questions which i couldn't find the answers on the web.
1) Describe combustion in terms of slow, spontaneous and explosive reactions and explain the conditions under which these occur
2) explain the importance of collisions between reacting particles as a criterion for determining reaction rates
3) process information from secondary sources to investigate the conditions under whcih explosions occur and relate these to the importance of collisions between particles
4) relate the conditions under which explosions occur to the need for safety in work environments where fine particles mix with air
so, please give detailed answers to those questions. ( i need at least one whole page) and if there are any links to those questions, i would really appreciate it ::P
And 10 points for the best answer. thanks!
1) Describe combustion in terms of slow, spontaneous and explosive reactions and explain the conditions under which these occur
2) explain the importance of collisions between reacting particles as a criterion for determining reaction rates
3) process information from secondary sources to investigate the conditions under whcih explosions occur and relate these to the importance of collisions between particles
4) relate the conditions under which explosions occur to the need for safety in work environments where fine particles mix with air
so, please give detailed answers to those questions. ( i need at least one whole page) and if there are any links to those questions, i would really appreciate it ::P
And 10 points for the best answer. thanks!
-
1. Combustion reactions are spontaneous, therefore once started they proceed without further assistance and continue until all the fuel is consumed.
- Slow combustion: this occurs in slow combustion stoves where large lumps of fuel (coal, wood or coke) take many hours to burn e.g. steam trains and fire places. Speed is limited by the amount of air that can access the solid i.e. small surface area to volume ratio lowers the reaction speed.
- Fast combustion: this occurs during the burning of heating oil, kerosene or liquefied petroleum gas in stoves and heating appliances. By increasing the surface area/volume ratio by powdering or vaporising a fuel, oxygen is allowed easy access so the fuel burns quicker.
- Explosive combustion: this occurs in cylinders of petrol and diesel engines in vehicles. An explosion is just an extremely rapid reaction (few microseconds).
2. Anything that increases the rate of reaction at which collisions occur will increase the rate of reaction.
Homogeneous reactions occur when the reactants in are in the same state. Factors which affect the reaction rate in these reactions are:
- Slow combustion: this occurs in slow combustion stoves where large lumps of fuel (coal, wood or coke) take many hours to burn e.g. steam trains and fire places. Speed is limited by the amount of air that can access the solid i.e. small surface area to volume ratio lowers the reaction speed.
- Fast combustion: this occurs during the burning of heating oil, kerosene or liquefied petroleum gas in stoves and heating appliances. By increasing the surface area/volume ratio by powdering or vaporising a fuel, oxygen is allowed easy access so the fuel burns quicker.
- Explosive combustion: this occurs in cylinders of petrol and diesel engines in vehicles. An explosion is just an extremely rapid reaction (few microseconds).
2. Anything that increases the rate of reaction at which collisions occur will increase the rate of reaction.
Homogeneous reactions occur when the reactants in are in the same state. Factors which affect the reaction rate in these reactions are:
12
keywords: THE,ANSWER,BEST,FOR,QUESTIONS,10,POINTS,CHEMISTRY,HELP,HELP! CHEMISTRY QUESTIONS- 10 POINTS FOR THE BEST ANSWER