Question

150g of weight (pressure) the volume of air in the syringe is 8.5 cc. What is the volume of air in the syringe if the weight used was 350 g?

Answer 1

1) List the known and unknown quantities.

Initial conditions:

Weight (pressure): 150 g.

Volume: 8.5 cc.

Final conditions:

Weight (pressure): 350 g.

Volume: unknown.

2) Assuming we can use weight as pressure, we can use Boyle's law.

This law states that there is a relationship between pressure and volume according to the following question:

`P_1V_1=P_2V_2`

3) Plug in the known quantities and solve for V2.

`(150\text{ }g)*(8.5\text{ }cc)=(350\text{ }g)*(V_2)`
`V_2=\frac{(150\text{ }g)*(8.5\text{ }cc)}{350\text{ }g}`
`V_2=\frac{(150\text{ }g)*(8.5\text{ }cc)}{350\text{ }g}=3.64286\text{ }cc`

The volume in the syringe would be 3.6 cc if 350 g were used.

.