Question
In: Chemistry
At 700 K acetaldehyde decomposes in the gas phase to methane and carbon monoxide. The reaction...
At 700 K acetaldehyde decomposes in the gas phase to methane and carbon monoxide. The reaction is: CH3CHO(g)→CH4(g)+CO(g) A sample of CH3CHO is heated to 700 K and the pressure is measured as 0.11 atm before any reaction takes place. The kinetics of the reaction are then followed by measurements of total pressure and these data are obtained: t(s) 0 1000 3000 7000 PTotal (atm) 0.11 0.12 0.12 0.14
Find total pressure after 1.89×104 s .
Express your answer to two significant figures and include the appropriate units.
Solutions
Expert Solution
CH3CHO <----------------------------> CH4 + CO
0.11 0 0 ---------------------> initial
0.11- x x x ----------------------->after some time
at 1000 sec:
0.11 - x + x + x = 0.12
0.11 +x = 0.12
x = 0.01
remaining = Pt = 0.1 atm
decomposition of acetaldehyde second order .
so
k = 1/t [1/Pt - 1/Po]
k = 1/000 [1/0.1 - 1/0.11]
k = 9.1 x 10^-4 M-1 s-1
now at time 1.89 x 10^4 sec
9.1 x 10^-4 = 1/ 1.89 x 10^4 [1/ Pt - 1/0.11]
Pt = 0.038
Po - x = Pt
0.11 - x = 0.038
x = 0.072
total pressure = Pt = Po + x = 0.11 + 0.072 = 0.18 atm
total pressure after given time = 0.18 atm
queen_honey_blossom answered 2 years agoRelated Solutions
At 700 K acetaldehyde decomposes in the gas phase to methane and carbon monoxide. The reaction...
At 700 K acetaldehyde decomposes in the gas phase to methane and
carbon monoxide. The reaction is:
CH3CHO(g)→CH4(g)+CO(g)
A sample of CH3CHO is heated to 700 K and the pressure is measured
as 0.27 atm before any reaction takes place. The kinetics of the
reaction are then followed by measurements of total pressure and
these data are obtained:
t(s)
0
1000
3000
7000
PTotal (atm)
0.27
0.30
0.34
0.39
Find total pressure after 1.47×104 s .
At 700 K acetaldehyde decomposes in the gas phase to methane and carbon monoxide. The reaction...
At 700 K acetaldehyde decomposes in the gas phase to methane and
carbon monoxide. The reaction is:
CH3CHO(g)→CH4(g)+CO(g)
A sample of CH3CHO is heated to 700 K and the pressure is measured
as 0.47 atm before any reaction takes place. The kinetics of the
reaction are then followed by measurements of total pressure and
these data are obtained:
t(s)
0
1000
3000
7000
PTotal (atm)
0.47
0.55
0.65
0.75
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1.
Rate=−ΔPCH3CHOΔt=6.0×10−4s−1PCH3CHO
2.
Rate=−ΔPCH3CHOΔt=3.0×10−4s−1PCH3CHO
3.
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At 700 K acetaldehyde decomposes in the gas phase to methane and carbon monoxide. The reaction...
At 700 K acetaldehyde decomposes in the gas phase to methane and
carbon monoxide. The reaction is:
CH3CHO(g)→CH4(g)+CO(g)
A sample of CH3CHO is heated to 700 K and the pressure is measured
as 0.41 atm before any reaction takes place. The kinetics of the
reaction are then followed by measurements of total pressure and
these data are obtained:
t(s) 0 1000 3000 7000
PTotal (atm) 0.41 0.47 0.56 0.64
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Consider the decomposition of acetaldehyde (CH3CHO) into methane (CH4) and carbon monoxide (CO).
Consider the decomposition of acetaldehyde (CH3CHO)
into methane (CH4) and carbon monoxide (CO).CH3CHO → CH4 + COAn experiment is performed where the concentration of
acetaldehyde is measured at various time intervals, resulting in
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