Methanol at 25 deg C is fed at a constant rate of 1.1 L/sec to a storage tank. The tank capacity is 2,274. kg. The tank is initially filled with 549. kg of methanol. How long until the tank overflows (in seconds)? Assume the density of methanol is 0.792 g/cm3 at 25 deg C.

Respuesta :

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Answer:

[tex]\large \boxed{\text{2000 s}}[/tex]

Explanation:

1. Calculate the mass of methanol needed to fill the tank

[tex]\begin{array}{rcr}\text{Tank capacity} & = & \text{2274. kg}\\\text{Less mass present} & = & -\text{549. kg}\\\text{Remaining capacity} & = & \text{1725. kg}\\\end{array}[/tex]

2. Calculate the volume of methanol needed to fill the tank

ρ = 0.792 g/cm³ = 0.792 kg/L

[tex]V = \text{1725. kg} \times \dfrac{\text{1 L}}{\text{0.792 kg}} = \text{2178 L}[/tex]

3.Calculate the time required to fill the tank

[tex]\text{Time} = \text{2178 L} \times \dfrac{\text{1 s }}{\text{1.1 L}} = \text{2000 s}\\\\\text{It will take $\large \boxed{\textbf{2000 s}}$ (about 33 min) for the tank to overflow}[/tex]

Note: The answer can have only two significant figures because that is all you gave for the flow rate.