Methane, CH4, reacts with I2 according to the reaction CH4( g )+I2( g )CH3I( g )
ID: 895682 • Letter: M
Question
Methane, CH4, reacts with I2 according to the reaction CH4(g)+I2(g)CH3I(g)+HI(g)
At 630 K, Kp for this reaction is 2.26×104. A reaction was set up at 630 K with initial partial pressures of methane of 105.1 torr and of 7.96 torr for I2.
Part A
Calculate the pressure, in torr, of CH4.
Express your answer to four significant figures and include the appropriate units.
SubmitMy AnswersGive Up
Part B
Calculate the pressure, in torr, of I2.
Express your answer to three significant figures and include the appropriate units.
SubmitMy AnswersGive Up
Part C
Calculate the pressure, in torr, of CH3I.
Express your answer to three significant figures and include the appropriate units.
SubmitMy AnswersGive Up
Part D
Calculate the pressure, in torr, of HI.
Methane, CH4, reacts with I2 according to the reaction CH4(g)+I2(g)CH3I(g)+HI(g)
At 630 K, Kp for this reaction is 2.26×104. A reaction was set up at 630 K with initial partial pressures of methane of 105.1 torr and of 7.96 torr for I2.
Part A
Calculate the pressure, in torr, of CH4.
Express your answer to four significant figures and include the appropriate units.
SubmitMy AnswersGive Up
Part B
Calculate the pressure, in torr, of I2.
Express your answer to three significant figures and include the appropriate units.
SubmitMy AnswersGive Up
Part C
Calculate the pressure, in torr, of CH3I.
Express your answer to three significant figures and include the appropriate units.
SubmitMy AnswersGive Up
Part D
Calculate the pressure, in torr, of HI.
Explanation / Answer
CH4(g)+I2(g)CH3I(g)+HI(g)
At 630 K, Kp = 2.26×104 and initial partial pressures of methane = 105.1 torr and of 7.96 torr for I2.
CH4(g) + I2(g) CH3I(g)+ HI(g)
I 105.1 torr 7.96 torr 0 0
C -x -x +x +x
E........ (105.1-x) (7.96-x) x x
Kp= x^2/ (105.1-x)(7.96-x)
X= 0.42217 torr
At equilibrium pressure of CH4 = 105.1-x= 105.1-0.42217 torr = 104.7 torr
At equilibrium pressure of I2 = 7.96-x = 7.96-0.42217 torr = 7.54 torr
At equilibrium pressure of CH3I =0.42217 torr
At equilibrium pressure of HI =0.42217 torr