p v = constant, if T is kept constant

v/T = constant, if p is kept constant

p/T = constant, if v is kept constant

T/p = constant, if v is kept constant

partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

carbonisation of bituminous coal

passing steam over incandescent coke

passing air and a large amount of steam over waste coal at about 650 Degree Centigrade

depends

does not depend

not related

none of these

temperature limits

pressure ratio

compression ratio

cut-off ratio and compression ratio

elements

compounds

atoms

atoms