pV=nRT - n masa molara
ΔU=ni/2RΔT
destindere izoterma T constant,ΔU=0 deci fals
comprimare adiabata [tex]P V^{β} [/tex]=contst =>[tex]T2/T1=(V1/V2) ^{β-1} [/tex]>1 deci adevarat (β-1>0)
izocora V=0, temperatura se modifica deci nu e constanta fals
izobar p=0, T2/T1=V2/V1<1 deci scade fals