You set up an experiment as shown below to determine the pressure at which a clo

Question

You set up an experiment as shown below to determine the pressure at which a cloud will form at various temperatures. Before starting the experiment, you determine the following information. initial temperature within the flask = 26.7 degree C atmospheric pressure = 1.14 atm volume of experimental apparatus = 153 mL You experimentally increase the temperature in the flask. Using the syringe to modify the volume of the apparatus, you are able to create a cloud in the flask, as shown below Once you complete your experiment, you record the following final information. final temperature within the flask = 42.8 degree C volume of experimental apparatus = 156 mL Using the combined gas law, calculate the new pressure that allowed the cloud's formation in atmospheres.

Explanation / Answer

we know that

the combined gas law is given as

P1V1/T1 = P2V2 /T2

given

P1 = 1.14 atm

V1 = 153 ml

T1 = 26.7 C

T1 = 26.7 + 273 K

T1 = 299.7 K

also

V2 = 156 ml

T2 = 42.8 C

T2 = 42.8 + 273

T2 = 315.8 K

so

using those values

we get

P1V1/T1 = P2V2/T2

1.14 x 153 / 299.7 = P2 x 156 / 315.8

P2 = 1.178 atm

so

the new pressure will be 1.178 atm

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