Recent content by zaboda42

So if the piston was at 300 mmHg, there would be some vapor?

Suppose A and B form an ideal solution under a piston. The vapor pressure of pure A is 300 mmHg and that of pure B is 800 mmHg (at the same temperature). If the piston maintains 700 mmHg, what fraction of vapor is present in a 40 mole% A and 60 mole% B mixture. The answer is "there is no...

Suppose you have a mixture of 30 mol% pentane and 70 mol% hexane at 1 atm and 60oC. If the Tbubble-point = 55.1oC, calculate the composition of vapor of the first bubble as the mixture is heated. I found p*pentane = 1392.95 and p*hexane = 484.96 using Antoine's equation with T = 55.1. Now I...

Convert the 2 L given into moles of methane. I suppose a pretty straightforward process from here. Thank you for your help!

So then my answer simple becomes xmethane = P/Hmethane(T)? ... P = 8453 mmHg = 11.12 atm xmethane = 11.12/(2.97 x 104 atm) = 3.744 x 10-4 Does this process appear correct?

Suppose water at the bottom of a well contains dissolved methane. When the water is pumped up, the dissolved gas is released. How many moles of methane gas will be released if the well is 115 m deep and holds 2 L. Assume a Henry's law constant of 2.97 x 104 atm at 10o C (at the bottom of the...

Thanks for the response. I'm not sure where my "multiple errors" are occurring. Can you lend some insight as to where I should be rechecking?

Consider a three-tank system modeled by the equations: x_1' = -5x_1+5x_3 x_2' = 5x_1-2x_2 x_3' = 2x_2-5x_3 (A) Initially there are 10 pounds of grain in each tank. What will the amounts be as t \rightarrow \infty? (B) Solve the system and verify your conclusion from (A). I'm...

Any thoughts?

I know that a potential differential equation may be my'' + ky = 0. Does this get me anywhere?

A 1 lb weight is suspended from a spring. Let y give the deflection (in inches) of the weight from its static deflection position, where “up” is the positive direction for y. If the static deflection is 24 in, find a differential equation for y. Solve your equation and determine the period and...

No I am just asking because would that mean that M is >= 0? Because the n+1'th derivative of cos(0.5) is just 0. Or, is M just the function itself?... M >= cos(0.5)

What if f(x) is equal cos(0.5)?

Bumpp - anyone else!?

The spread of a disease in a population is modeled by the differential equation dP/dt=.03P(30-P) where p is less than or equal to 30 is measured in thousands of people and t is greater or equal to 0 is measured in weeks. a) Find the general solution of the differential equation. b) Find the...