For the cracking reaction, C3H8(g) C2H4(g) + CH4(g) The equilibrium conversion is negligible at 300 K,

Question:

For the cracking reaction,
C3H8(g) → C2H4(g) + CH4(g)
The equilibrium conversion is negligible at 300 K, but becomes appreciable at temperatures above 500 K. For a pressure of 1 bar, determine:
(a) The fractional conversion of propane at 625 K.
(b) The temperature at which the fractional conversion is 85%.