Question

At 571.6 mmHg and 25 °C, a gas sample has a volume of 2,275 ml Determine the final pressure (in mmHg) at a volume of 1,255 mL and a temperature of 175°C? Show all your work

Answer 1

Here, there are 2 conditions of the gas here.

The next equation is used: (1)

`(P1xV1)/(T1)=(P2xV2)/(T2)`

Data: conditions 1

P1 = pressure, in mmHg = 571.6 mmHg

T1 = temperature, in K = 25 °C + 273 = 298 K

V1 = 2,275 mL

-------------

Data: conditions 2

P2 = needs to be calculated

T2 = 175 °C + 273 = 448 K

V2 = 1,255 mL

--------------

From (1), P2 is cleared:

(P1 x V1/T1) x T2/V2 = P2

(571.6 mmHg x 2,275 mL/298 K) x (448 K/1,255 mL) = P2

1558 mmHg = P2

Answer: P2 = 1558 mmHg