What is the final volume?

Question

A sample of argon gas has a volume of 735 mL at a pres-sure of 1.34 atm and a temperature of 124 ∘C. What is the final volume of the gas, in milliliters, when the pressure and temperature of the gas sample are changed to the following, if the amount of gas does not change?

1) 640 mmHg and 327 K

2) 0.50 atm and 85 ∘C

3) 14.6 atm and -14 ∘C

Answer 1

Combined gas law:

P1V1/T1 = P2V2/T2. Make sure temp is is Kelvin

P1 = 1.34 atm

V1 = 735 ml

T1 = 124C +273 = 397K

P2 = 640 mm x 1atm/760 mm = 0.842 atm

V2 = ?

V2 = P1V1T2/P2T1

plug in the values and solve.

Do the others the same way.