Question 1.

A gas sample occupies 650 mL at 525 mm Hg. What would happen to the volume at 652 mm Hg?
A: Decrease
B: Triple
C: Remain the same
D: Increase

Question 2.

What would be the new volume of a 650 mL gas sample under 525 mm Hg of pressure when the pressure increases to 652 mm Hg?
A: 650 mL
B: 523 mL
C: 807 mL
D: 527 mL

The volume will decrease. (option A)

The new volume will be 523 mL (option B)

Explanation:

Step 1: Data given

p1v1/t1 = p2v2/t2

A gas sample occupies 650 mL at 525 mm Hg. What would happen to the volume at 652 mm Hg?

Data given:

650 mL = 0.650 L

525 mm Hg = 525/760 = 0.69079 atm

652 mm Hg = 652 / 760 = 0.857895 atm

Calculate the new volume:

p1*V1 = p2*V2

⇒with V1 = the initial volume = 0.650 L

⇒with p1 = the initial pressure = 0.69079 atm

⇒with p2 = the final pressure = 0.857895 atm

⇒with V2 = The final volume = TO BE DETERMINED

V2 = (p1*V1)/p2

V2 = (0.69079 * 0.650) / 0.857895

V2 = 0.523 L = 523 mL

The volume will decrease. The new volume will be 523 mL

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