Question

According to Boyle’s Law, if the volume of a sample of O2 gas is doubled while the temperature is held constant, what happens to the pressure?
a) It doubles.
b) It decreases by ½.
c) It remains constant.

Answer 1

Hello @FreyaBeauchamp !

Answer 2

U know the equation PV=nRT ?

Answer 3

Yeah i do

Answer 4

that's good.

Answer 5

Now let us see what happens if we keep the Temperature constant

Answer 6

In this case P will become inversely proportion to V

Answer 7

So does that mean that the pressure remains constant?

Answer 8

No..no..only (R), T & n will be constant

Answer 9

P will vary inversely to V

Answer 10

so if u double the volume then pressure will get halved

Answer 11

are u getting ?

Answer 12

So the pressure doubles?

Answer 13

oh okay so if it gets halved then it It decreases by ½ right?

Answer 14

if volume gets halved then pressure gets doubled, if volume gets doubled then pressure gets halved

Answer 15

got it ?

Answer 16

Yeah, thanks for explaining :) Just to make sure, so the answer is a) It doubles right?

Answer 17

No u still didnt got the logic

Answer 18

I don't understand..

Answer 19

read the last line i wrote

Answer 20

read ?

Answer 21

Okay, so you said if volume gets doubled then pressure gets halved and in the problem
The volume does get doubled so that means the pressure gets halved. So does that mean the pressure will decrease by ½?

Answer 22

Bingo !!

Answer 23

U r awesome !

Answer 24

Thank you but you helped me so much! Thank you again :)