3. Which of the following graphs (A,B,C,D] correctly represents the relationship

Question

3. Which of the following graphs (A,B,C,D] correctly represents the relationship between the pressure and the volume of an ideal gas that is held at constant temperature? A balloon with a volume of 2.0 L is filled with a gas at 3 atmospheres. If the pressure is reduced to 0.5 atmospheres without a change in temperature, what would be the volume of the balloon? Hint: Use P, V,-P, V, where 4. P, - initial pressure Vi = initial volume P final pressure Vf final volume To find the final volume, solve the equation for V

Explanation / Answer

Q3

note that

PV = k, accoridng to gas law ratios

y-x equaiton is:

P = k/V or

P = k*1/V

therefore, this is not linear, ignore A and D

from the list, note that as V increase, P decreases

choose B , since this is the best ratio PV stated

Q4

V = 2L, P = 3 atm

V x = P = 0.5

P1V1 = P2V2

V2 = P1V1/P2 = 3/0.5*2 = 12 L

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