Question

The pressure of a 250 mL sample of gas is 105 kPa. What would be the pressure if the volume were increased to 375 ml?

Answer 1

The answer is 70 kPa

Step-by-step explanation:

In order to find the pressure if the volume were increased to 375 ml we use Boyle's law

That's

`P_1V_1 = P_2V_2`

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the final pressure

`P_2 = (P_1V_1)/(V_2) \\`

From the question

P1 = 105 kPa = 105 , 000 Pa

V1 = 250 mL

V2 = 375 mL

So we have

`P_2 = (105000 * 250)/(375) = (26250000)/(375) \\ = 70000`

We have the final answer as

70 kPa

Hope this helps you