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 = 31.2°C atmospheric pressure = 1.15 atm volume of experimental apparatus = 180, 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 = 37.9°C olume of experimental apparatus = 183 mL Using the combined gas law, calculate the new pressure that allowed the cloud's formation in atmospheres. X atm

Explanation / Answer

Apply combined gas law

P1V1/T1 = ¨P2V2/T2

solve for P2

P2 = P1V1/T1*T2/V2

P2 = (1.15)(180)/(31.2+273) * (37.9+273.15) /(183)

P2 = 1.15661 atm

the pressure is not likely to change, since volume is almos the same an dtemperature just increased 4°C

overall effect is almost null

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