1.
PV = nRT
P1= 2 atm, V1= 6 L, T1= 273+10 = 283 K
=> n = P1V1/RT1
= 2x6/0,082x283 = 0,517 moli
P2= ? atm , T2= 273+80 = 353 K , V2= 15 L
=> P2V2 = nRT2
=> P2= nRT2/V2
= 0,517x0,082x353/15 = 1 atm (aproximativ)
2.
PV = nRT
P= 5 atm, V= ?, n= 10 moli, T= 273+227 = 500 K
=> V = nRT/P
= 10x0,082x500/5 = 82 L
3.
140g n moli
2Mg + O2 --> 2MgO
2x24 1
=> n = 140x1/2x24 = 2,92 moli O2 in c.n.
PV = nRT
T= 273
27 = 300 K, P= 4 atm, V= ?
=> V = nRT/P
= 2,92x0,082x300/4 = 17,94 L O2