Question

Question #d4a17

Answer 1

Using the Combined gas law and adjusting it to solve for Pressure, I calculate the container will have a pressure of 144.2 Atmospheres. Remember to convert the Celsius temperature to Kelvins!

Explanation:

Since you can't use either Boyle's Law or Charles' Law, the combined gas law would be best for a problem like this:

`(P_1V_1)/T_1 = (P_2V_2)/T_2`

The question calls for :
(a) An answer in Atmospheres
(b) Unchanging volume

Because of (a), we will need to readjust the formula to solve for pressure:

`(T_2P_1V_1)/(T_1V_2) = P_2`

Since volume is kept constant, `V_1` and `V_2` are equal and thus cancel. Also, you must remember to convert the temperature from Celsius to Kelvins (simply add 273.15 to each of the Celsius temperatures).

`P_2 = ((338.15 K)(125 ATM))/(293.15 K)`

`P_2 = 144.2 ATM`