Decomposition of phosphine into P and H2 (gas) follows the equation:
4PH3 (g) => 4P (g) + 6H2 (g)
Reaction in the same direction and first order at 650oC.
Reaction rate constant (1-second)
with T in K. The reaction is carried out in a closed reactor, the first fixed volume contains only phosphine and a pressure of 1 atm. What is the system pressure after 50, 100 and 500 seconds, if the reaction is considered isothermal (T = 650 + 273 = 923K)
