- #1

RSG_9

- 8

- 0

## Homework Statement

A hand pump was used to raise the pressure of the air in a flask of volume 1.2 x 10^-4 m^3, without and then with powder in the flask.

- Without powder, pressure increased from 110kPa to 135kPa

- With 0.038kg of powder, pressure increased from 100kPa to 141kPa

1) Show that the volume of air in the hand pump initially was 2.7 x 10^-5 m^3.

2) Calculate the volume and the density of the powder.

## Homework Equations

pV=nRT

P=pressure V=volume n=#of moles R=gas constant T=temp

## The Attempt at a Solution

For the first part, I found the increase in pressure factor to be 1.23, multiplied this to the volume, then took away the original volume which got me an answer of 2.76x10^-5... I wasn't sure if that was the right method to take so I didn't want to start the second part without fully understanding the first.