Question

In: Chemistry

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

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

aA gas with a pressure of 1.25

atm at 60 ∘C is cooled to -24 ∘C.

b. A sample of

N2 with a pressure of 760 mmHg at -70 ∘C is heated to 34 ∘C.

Solutions

Expert Solution

A)

                 Initial conditons                                      Final conditions

Pressure = P1= 1.25 atm                              Pressure = P2=

Temp = T1=60C=60+272=333K                   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

B)

For N2

                       Initial condition                                        Final condition

Pressure = P1= 760 mm                                        Pressure = P2=

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

P1/T1=P2/T2

760/203 = P2/307

P2= 1149.36 torr.

queen_honey_blossom answered 1 year ago
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