1.
oC K oF
4oC 273,15+4= 277,15 K 4°C×9/5+32 = 39.2°F
293,15-273,15= 20oC 293,15 K 20°C×9/5+32 = 68°F
x°C×9/5+32 = 172,4°F
=> x = 78oC 273,15+78= 351,15 K 172,4 oF
2.
t1= 27oC => T1 = 273,15+27 = 300,15 K
t2= 100oC => T2= 273,15+100 = 373,15 K
P= 3 atm.,
PV = nRT, unde nR/V = cst.
=> P1/T1 = nR/V si P2/T2 = nR/V
=> P1/T1 = P2/T2 => P2 = P1T2/T1 = 3x373,15/300,15 = 37,3 atm
