512
Calculate the rate constant Let the pressure of N2O5(g) decrease by 2x atm As two moles of
N2O5 decompose to give two moles of N2O4(g) and one mole of O2 (g),
the pressure of N2O4 (g) increases by 2x atm and that of O2 (g)
increases by x atm ( )
( )
( )
2
5
2
4
2
g
g
g
2N O
2N O
O
→
+
Start t = 0       0