Question

What is the volume of the gas in a balloon at –1950C, if the balloon has been filled to a

volume of 5 L at 250C?​

Answer 1

Answer:

Explanation:

The new volume will be  

0.7 L

This is an example of Charles' law, sometimes called the temperature-volume law. It states that the volume of a gas is directly proportional to the Kelvin temperature, while pressure and amount are held constant.

The equation is  

V

1

T

1

=

V

2

T

2

, where  

V

is volume and  

T

is temperature in Kelvins.

Known

V

1

=

0.5 L

T

1

=

20

∘

C

+

273.15

=

293 K

T

2

=

150

∘

C

+

273.15

=

423 K

Unknown

V

2

Solution

Rearrange the equation to isolate  

V

2

. Substitute the known values into the equation and solve.

V

2

=

V

1

T

2

T

1

V

2

=

(

0.5

L

×

423

K

)

293

K

=

0.7 L

rounded to one significant figure