Problem: 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 0.31 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)010003000  7000  PTotal (atm)0.31  0.35  0.400.46Find total pressure after 1.51 × 104 s .

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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 0.31 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)010003000  7000  
PTotal (atm)0.31  0.35  0.400.46


Find total pressure after 1.51 × 104 s .

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