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, in part i)
we are to determine the pressure due to the vapor at the two different temperatures
using the ideal gas law. This type of problem should be recognized as a change
of condition problem. The variables are pressure and temperature so the important
equation to calculate the new pressure is,
P_{1}/T_{1}
= P_{2}/T_{2}
To calculate the pressure
due to the vapor at degrees celsius we need to
use the data in the table below. Using the equation above we solve for the new
pressure.
.
Initial Pressure

Initial Temperature (K)

Final Pressure

Final Temperature (K)

P_{1} =
mmHg

T_{1}
= 273 K

P_{2} =

T_{2}
= 273 K

P_{2} = (P_{1}
* T_{2})/T_{1} = *273/273
= 0 mmHg mmHg
To calculate the pressure
due to the vapor at degrees Celsius we need
to use the data in the table below.
.
Initial Pressure

Initial Temperature (K)

Final Pressure

Final Temperature (K)

P_{1} =
mmhg

T_{1}
= 273 K

P_{2} =

T_{2}
= 273 K

P_{2} = (P_{1}
* T_{2})/T_{1} = *273/273
= 0 mmHg mmHg
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