Solve for the new pressure in each of the following, with n and V constant: aA gas...

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Chemistry

Solve for the new pressure in each of the following, withn and V constant:
aA gas with a pressure of 1.25
atm at 60 âˆ˜C is cooled to -24 âˆ˜C.
b. A sample of
N2 with a pressure of 760 mmHg at -70 âˆ˜C is heated to 34 âˆ˜C.

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3.9 Ratings (684 Votes)

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Initial conditonsÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Final conditions

Pressure = P1= 1.25 atmÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Pressure = P2=

Temp = T1=60C=60+272=333KÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Temp = T2= -24C= -24+273= 249K

At constant Volume

P1/T1=P2/T2

1.25/333 = P2/249

P2= 0.935 atm

Final pressure = P2= 0.935 atm

For N2

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Initial conditionÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Final condition

Pressure = P1= 760 mmÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Pressure = P2=

Temp = T1= - 70C= - 70+273=203K Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Temp = T2=34C = 34+273=307K

P1/T1=P2/T2

760/203 = P2/307

P2= 1149.36 torr.

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