Coke can be used to reduce `FeO` to `Fe` at temperatures above 1073K`. Justify this reduction with the help of an Ellingham diagram.

Carbon cannot reduce Fe_2O_3 to Fe at a temperature below 983 K because

How can you predict the feasibility of reduction of a metal oxide by another metal with the help of Ellingham diagram?

Predict the temperature for the carbon reduction of Cu_(2)O from the Ellingham diagram.

The reduction of iron oxide occurs in the blast furnace by C at tempertures above 1073K and by CO at temperature below 1073 K - why?

Although carbon and hydrogen are good reducing agents, they are not used in the reduction of metal oxides at high temperatures - why ?

In has been estimated that the total energy radiated by the sun is 3.8xx10^26 J per second. The source of energy of stars is a thermonuclear reaction called nuclear fusion. Fusion reactions are not controlled. It is presumed that the energy of stars is due to two processes called proton-proton cycle and carbon nitrogen cycle. Fusion cannot take place at ordinary temperature. This, hydrogen bomb uses a small fission bomb, which on explosion causes the temperature to rise very high about 10^7 K. We have yet to see how a hydrogen bomb can be used for peaceful life-sustaining purpose. Energy released in the process of fusion is due to mass defect. It is also called Q-value. Q =Deltamc^2 , Deltam= mass defect Answer the following questions based on above passage: Fusion reaction takes place at about: