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Why are such high temperatures needed and where does the the energy come from for extraction of metals?
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Is energy saved if we recycle metals?
Yes, you save all the energy that would have been needed to mine fresh ore from the ground and to extract the metal from that ore. The amount of energy needed to collect and sort the recycled metals is insignificant compared to this (especially for metals like aluminum that are very hard to extract from their ores).You only need to use the energy needed to melt the pure metal, which you would have needed anyway after extraction of new metal from fresh ore.
How does a catalyst speed a reaction at low temperatures?
Catalysts will lower the activation energy needed for a certain reaction to happen. For example in the extraction of Aluminium from Bauxite (Aluminium Oxide) The melting point of Al2O3 is about 2000oC. But with the catalyst Cryolite (Na3AlF6), the overall melting point is lowered to about 950oC,
What is one example of a place where naturally occurring extreme temperatures provide the energy needed to bring hydrogen nuclei together in a fusion reaction?
stars such as our sun
What type of energy does active transport require?
Yes, energy is needed for active transport, while energy is not needed to be inputted for passive forms of transport.
What it the term used to describe the energy needed to get a reaction started?
The energy needed to get a reaction started is called activation energy.
Is energy saved if we recycle metals?
Yes, you save all the energy that would have been needed to mine fresh ore from the ground and to extract the metal from that ore. The amount of energy needed to collect and sort the recycled metals is insignificant compared to this (especially for metals like aluminum that are very hard to extract from their ores).You only need to use the energy needed to melt the pure metal, which you would have needed anyway after extraction of new metal from fresh ore.
Why is it important to recycle metals that you extract by electrolysis?
It takes a lot of electric power to refine metals by electrolysis. Such metals therefore are a kind of stored energy. If they are not recycled, that energy is lost, and more energy will be needed to refine more metals by electrolysis to replace them. High energy consumption is a major factor in environmental pollution.
How does a catalyst speed a reaction at low temperatures?
Catalysts will lower the activation energy needed for a certain reaction to happen. For example in the extraction of Aluminium from Bauxite (Aluminium Oxide) The melting point of Al2O3 is about 2000oC. But with the catalyst Cryolite (Na3AlF6), the overall melting point is lowered to about 950oC,
Are metals oxidants ot reductants?
metals generally acts as reductants because a relatively small amount of energy is needed to remove the small number of outer-shell electrons in metals.
Which are the major Industries in great Britain?
Besides agriculture, you can imagine that Great Britain were into ship building and they needed energy so they had coal mining efforts and they also needed iron (iron ore extraction) to build tools and hardware.
Where on the most reactive metals on the periodic table?
the bottom of the Periodic Table. why? a metal looses electrons and at the bottom of the periodic table is the lowest amount of ionization energy (the energy needed to remove electrons) with low ionization energy, not much energy is needed to remove those electrons making it faster and easier to do so.
Are enzymes used in a chemical reaction?
Yes. Enzymes lower the activation energy needed to start a chemical reaction so that they can occur at temperatures safe for the organism.
What is one example of a place where naturally occurring extreme temperatures provide the energy needed to bring hydrogen nuclei together in a fusion reaction?
stars such as our sun
Why are enzymes used to perform hydrolysis in living systems?
Enzymes are needed to lower the activation energy so that the reaction can occur at temperatures at which living things can survive.
Why are aluminium and titanium expensive to extract?
They are reactive metals, and so need to be extracted from their ores using electricity, whereas less reactive metals like iron can be extracted by smelting - roasting with carbon - which is a lot cheaper to do. Both metals are useful because they both do not corrode, as they both have an oxide layer to protect them from corrosion. They both need to be extracted by a process called "electrolysis" which means to break up substances using electricity. Electrolysis uses a lot of energy (ie- very high temperatures) and a great deal of electricity. Therefore we need to recycle aluminium to conserve energy, as recycling aluminium does not require electrolysis.
Why is it important to protect a spacecraft from extreme temperatures?
Temperatures can be very high endangering the spacecraft and the astronauts. Therefore, temperatures needed to be constantly monitored.
First ionisation energy equation?
The equation for first ionization energy is the equation for the energy required to remove an electron from one mole of gaseous atoms to produce a mole of gaseous ions. It is as follows: X(g) ---> X^+1(g) + e^-1.
