Question

A 6.5 L sample of oxygen at 60C and 0.76
atm is allowed to expand to 13.0 L. The tem-
perature remains constant. What is the final
pressure?

Answer 1

Dear Sandy,

Boyles Law applies for gases at a constant temperature, and amount (mole).

Boyles Law:
\[P_1V_1=P_2V_2\]\[\frac{ P_1V_1 }{ V_2 }=P_2\]
Problem:

Initial volume (V1): 6.5 L
Final volume (V2): 13.0 L
Initial Pressure (P1): 0.76 atm
Final Pressure (P2): ?
Temperature (C): 60 C + 273.15 = 333 K

\[\frac{ (0.76 atm * 6.5 L) }{ 13.0 L } = 0.38 atm\]

The final pressure is 0.38 atm.

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Sincerely,
N