Question

If the TCE concentration in a 2000 cubic foot chamber was 500 ppm and the ventilation rate was 10 CFM. What was the concentration in the chamber after 8 hours

Answer 1

To calculate the concentration remaining after a certain time, we can use the equation
`C = C_0 * e^{(-kt)`. Using the given information, we can substitute the values and solve for the concentration remaining after 20.0 min.

To calculate the concentration remaining after a certain time, we can use the equation:

`C = C_0 * e^{(-kt)`

Where C is the concentration at the specified time, C₀ is the initial concentration, k is the rate constant, and t is the time.

Using the given information, we have:

C₀ = 0.0200 M

`k = 1.6 * 10^-^6 s^{(-1)`

t = 20.0 min = 20.0 min * (1 min / 60 s) = 0.333 hours

Substituting these values into the equation, we can calculate the concentration remaining after 20.0 min:

`C = 0.0200 M * e^((-1.6 )) * 10^-^6 s^((-1)) * 0.333 h)`

Solving this equation will give us the final concentration.