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

Answer:

The answer is 70 kPa

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

$P_2 = \frac{P_1V_1}{V_2}$

From the question

P1 = 105 kPa = 105 , 000 Pa

V1 = 250 mL

V2 = 375 mL

So we have

$P_2 = \frac{105000 \times 250}{375} = \frac{26250000}{375} \\ = 70000$

We have the final answer as

70 kPa

Hope this helps you