How can silicon be stronger than carbon, but carbon can reduce silicon dioxide? Please give an example
The product of carbon reduced silica is CO, not CO2, and the relationship with the reducibility will not be contradictory. Note that the reaction is state reaction at high temperature, with high boiling point substances to produce low boiling point substance "principle, the boiling point of C is higher than Si, Si will generate a low boiling substance from the gasification reaction system, continuously from the reaction will be carried out continuously, until exhausted.
The reducibility of Si is stronger than that of C because the atomic radius of Si is larger than C, and the shell electrons are less bound by the nuclear charge force, which makes it easier to lose electrons, so the reduction is stronger.
