Yes correct, it would be a temperature above 100 degrees hence the steam but you don't need to know the exact temperature but a range of 100-400 will suffice, Now you've answered that hence give me another way of making ethanol
Another way is fermentation which involves the use of sugar in a solution mixed with yeast which produces ethanol. For this method, you need a low temperature. However, the ethanol you get as a product is not very concentrated so you may have to distill it and it also may contain impurities which have to be removed by electrolysis.
Explain Wegner's continental drift theory (what he noticed and the actual theory)
Wegener hypothesised that originally the continents had formed a super-continent named Pangaea. He believed the continents eventually drifted apart, although he couldn't explain how. He used evidence of similar fossils being found in South America and the West coast of Africa, however, in 1920, scientists argued that a land bridge had originally connected the two continents. Wegener also used the idea of a 'jigsaw' in that South America and Africa would fit together. Nowadays, the idea of convection currents occuring in the mantle supports this theory.
Give an advantage and disadvantage of reusing poly(ethene) bags.
Wegener hypothesised that originally the continents had formed a super-continent named Pangaea. He believed the continents eventually drifted apart, although he couldn't explain how. He used evidence of similar fossils being found in South America and the West coast of Africa, however, in 1920, scientists argued that a land bridge had originally connected the two continents. Wegener also used the idea of a 'jigsaw' in that South America and Africa would fit together. Nowadays, the idea of convection currents occuring in the mantle supports this theory.
Give an advantage and disadvantage of reusing poly(ethene) bags.
Saves you 5p everytime u shop at tesco They rip like anything, need to double bag. Oh sorry chemistry right! 😂
Another way is fermentation which involves the use of sugar in a solution mixed with yeast which produces ethanol. For this method, you need a low temperature. However, the ethanol you get as a product is not very concentrated so you may have to distill it and it also may contain impurities which have to be removed by electrolysis.
Wegener hypothesised that originally the continents had formed a super-continent named Pangaea. He believed the continents eventually drifted apart, although he couldn't explain how. He used evidence of similar fossils being found in South America and the West coast of Africa, however, in 1920, scientists argued that a land bridge had originally connected the two continents. Wegener also used the idea of a 'jigsaw' in that South America and Africa would fit together. Nowadays, the idea of convection currents occuring in the mantle supports this theory.
Give an advantage and disadvantage of reusing poly(ethene) bags.
Advantage - you don't use as much energy that would otherwise be used in the making of a polymer so you save money. Disadvantage - idk :/
If it's about metal fatigue then yeh, it's in the revision guide and in the spec (If this ain't what ur on about leave me to it!) 😂
No doesn't say anywhere in the specification about stress of metals I even checked using a the find tool on chrome and 0 results showed for, stress or metal fatigue mistake me if i'm wrong or direct me to the page number in the specification
No doesn't say anywhere in the specification about stress of metals I even checked using a the find tool on chrome and 0 results showed for, stress or metal fatigue mistake me if i'm wrong or direct me to the page number in the specification
Bottom of page 23 of the CGP revision guide (red one)