- #1

Gregs6799

- 35

- 0

## Homework Statement

## Homework Equations

pV = (m/Mr)RT (this is the formula given but I got the wrong answer using it)

## The Attempt at a Solution

Mass = PV / RT

R = 8.314

P1 x V2 / R x T1

M = 220 x 0.1 / 8.314 x 298 = 788.549kg

Mass = 788.549kg

P = 440000

V = 0.1

R = 8.314

T = 298

440000 x 0.1 = 44000

M = mRT / PV

M = 44000 x 8.314 x 298 / 440000 x 0.1 = 24.77g.

Mass of air in piston = 24.77g.

P1 = 440000

V2 = 0.1

R = 8.314

T = 25 + 273 = 298 (from Celsius to kelvin)

P1 x V2 / R x T1

M = 440000 x 0.1 = 44,000

8.314 x 298 = 2477.572

44000 / 2477.572 = 17.759kg

All the above values are correct but the formulas and answers are incorrect.

I've posted here before and your probably sick and tired of trying to help me out but if anyone can give me the correct formula for question b only a is correct just b, I'd be very appreciative, but just the formula, try not to go too in depth with any replies as it will go over my head and confuse me all I need is the formula and in what order do the values need to go in, he answer should be in kgs.

Thank you.[/B]