The overall results of {HEAD ~ the reactions} of elements oxidation and reduction consist in the production of CO containing gas and evolving {TAIL ~ heat} 
The overall results of { HEAD ~ the reactions } of elements oxidation and reduction consist in the production of CO containing gas and evolving { TAIL ~ heat }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL