Exercitiile 3,4. Dau coroana.

3. pV= niuxRT
2X67,2= niux0,082x(273+27)
calculsaza niu......,
apoi m=niuxM= niux28=.........
5. aplica ecuatia
p1/T1= p2/T2 4/293= 8/T2--------> CALCULEAZA T2= t2+ 273, apoi t2!