Activity 1 1-19-11

Gases
-far apart- cooling of balloon
-density different- based on density molecular determines weight
-lots of movement- simulation
-diffusion-rather slow, bumping into one another
-Naming of common
Ideal Gas Law
-PU= nRT
     -p-presure
     -v-volume
     -n-moles of gas
     -t-temperature
     -r-gass constant
     -P1V1/N1t1=P2V2/n2T2
          -Condition "1" and Condition "2"
-example- with a balloon when you increase the temperature the volume goes up. If you decrease the temperature the volume will go down. (Direct Relationship)
-example- what will happen in a balloon when you decrease the pressure the pressure will increase or balloon will expand. (Inverse Relationship)
-example- when you add molecules to the balloon it will expand and they go together. ( Direct Relationship)

1. What is the tire pressure at -20 degrees F compared to 90 degrees F, assuming the starting pressure was 32 psi?
32 psi/305.2k=psi/244k
     psi= 32psi(244.26K)
                305.2 K
     psi=25.61 psi