Write short notes on the following terms a$)$ Compressed natural gas $($CNG$),$ b$)$ Steady flow process $($SFP$),$ c$)$ Higher calorific value $($HCV$),$ and d$)$ Lower calorific value $($LCV$).$ Calculate the e$)$ HCV and f$)$ LCV of coals having the following compositions $-85\%$ carbon, $8\%$ hydrogen, $1\%$ Sulphur, $2\%$ nitrogen, and $4\%$ ash. $[$Latent heat of steam is $587$ cal$/$g$).$

a$)$ Compressed natural gas $($CNG$)$

b$)$ Steady flow process:

c$)$ Higher calorific value $($HCV$)$

d$)$ Lower calorific value $($LCV$)$

e$)$ HCV of coal: HCV $=1/100[8,080$ x $\%$C$+34,500(\%$H$\%$O$/8)+2,240$ x $\%$S$]$ kcal$/$kg

Note $/$ please answer this question Briefly and do not use any telogens program to answer this question