Question

1. A typical home instant pot has an internal volume of 6.5 Liters. If the steam inside an instant pot with an internal pressure of 191.0 kPa and a temperature of 750.0 K was released into the atmosphere at 101.3 kPa and 298K, what volume with the steam occupy in the atmosphere?

2. Even though the pressure was reduced by nearly half in the scenario above, the volume of the gas decreased. Explain why. Support your answer with evidence and scientific reasoning.

Answer 1

Q.1

Given=

V1=6.5ltr

P1=191.0kPa

T1= 750.pK

P2= 101.3kpa

T2= 298K

V2=?

Combined gas law: P1V1/T1 = P2V2/T2

Use the gas laws for pressure, volume and temperature calculations

Now,

191.0×6.5/750= 101.3×V2/298

V2 = 191.0×6.5×298/750×101.3

On solving further

V2 = 4.86 ltr!

4.86 volume with the steam occupy in the atmosphere!

Q.2

Scientific Reasoning:-

Temperature is directly to proportional to the pressure in second scenario the temperature was reduced to nearly half of the first one hence the pressure also decreased simultaneously, and we all know according to charles law The volume of a given gas sample is directly proportional to its absolute temperature so the decreasing temperature affected the amount of volume that decreased!