Phosphine, PH3(g), decomposes according to the equation 4PH3(g) yields P4(g)+6H2
ID: 810668 • Letter: P
Question
Phosphine, PH3(g), decomposes according to the equation 4PH3(g) yields P4(g)+6H2(g)
The kinetics of the decomposition of phosphine at 950K was followed by measuring the total pressure in the system as a function of time. The data to the right were obtained in a run where the start of the reaction chamber contained only pure phosphine at the start of the reaction.
DATA: Time(min): a. 0.00, b. 40.0, c. 80.0, d. 100 ; Ptotal (Torr): a. 100, b. 151, c. 168, d. 171
The rate law describing this reaction is rate=k(PPH3).
Calculate the value of the rate constant, k=___min^-1.
Explanation / Answer
K = 2.95x10-2