Question

20 mL of hydrogen measured at 15° C is heated to 35°C.

What is the new volume at the same pressure?

Answer 1

V2 = 21.4 ml

Step-by-step explanation:

Note: When dealing with gases, make sure that you change the units from °C to K.

T1 = 15°C + 273 = 288K

T2 = 35°C + 273 = 308K

V1 = 20 ml

V2 = ?

We use Charles's law to solve V2:

V1/T1 = V2/T2

or

V2 = (T2/T1)V1

= (308K/288K)(20 ml)

= 21.4 ml