Gas Laws-Problems WS 13 1. Methane gas is compressed from 21 to 2.5 L at a const

Question

Gas Laws-Problems WS 13 1. Methane gas is compressed from 21 to 2.5 L at a constant temperature. The final pressure is 12.2 atm. What was the original pressure? 2. A sample of 23.0 L of NH3 gas at 10.0°C is heated at constant pressure until it fills a volume of 50.0 L. What is the new temperature in °C? ple of carbon dioxide gas in a 35-mL container is at a pressure of 451 mmHg 3. A sam and a temperature of 625°C. If the gas is allowed to cool at constant volume until the pressure is 375 mmHg, what is the new temperature in °C?

Explanation / Answer

1) This probelm is based on BOYle's law.

At constant temperature PV= constant

or P1V1 = P2V2

substituing the given values

P1 x 21L = 12.2 atm x 2.5L

Thus P1 = 1.45 atm

Q2)

Charles law states that at constant pressure the volume of a gas is directly propotrtional to its absolute temperature.

Thus V/T = constant or

V1/T1 = V2/T2

Substituing the given values

23L / 283K = 50L /T2

thus T2 = 615.22 K

= [615.22- 273.15 ]

= 342.06 C

Q3) keeping the volume constant, the pressure of a fixed amount of gas is directly proportional to itsabsolute temperature .

Thus P/T = constant or

P1/T1 = P2/T2

451mm/898K = 375mm/T2

and T2 = 746.67 K

=473.52 C

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.