Consider a fixed number of moles of unknown gas at a constant 31 degree C In ord

Question

Consider a fixed number of moles of unknown gas at a constant 31 degree C In order to double the pressure in the system the volume will have to a. Increase by a factor of 2 b. Increase by a factor of 1.414 c. Decrease by a factor of 2 d. Decreased by a factor of 1.414 The reason the pressure changes in the question above is because: a. The gas particles begin to move more quickly. b. The average force of the collisions with the walls of the container changes c. The frequency of the collisions with the walls of the container changes d. Both the frequency and force of the collisions change If you allow the sample of unknown gas to expand to double its current volume, but the number of moles and temperature remain constant, the average velocity of the gas will: a. Increase b. Decrease C Stay the same d. You need to know the pressure of the system to answer this question. If helium diffuses twice as fast as the unknown gas above, the identity of the unknown gas might be: a. Hydrogen (H2) b. Neon (Ne) c. Methane (CH4) d. Argon (Ar)

Explanation / Answer

Ans 25.c . Decrease by a factor of 2

Using the ideal gas law pV = nRT

where p is pressure , V is volume , r is universal gas constant and T is temperature.

If all other things are kept constant , then pressure is inversely proportional to volume .

p1V1 = p2V2

if p2 becomes 2p1 , then

p1V1 = 2p1 V2

V2 = V1?2

the new volume has decreased by a factor of two.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

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