DO NOW: Use P (pressure), T (temperature) or V (volume) to tell which property of a gas is described in each of the following measurements: 7. ______________________ 730 torr 8. ______________________ 2 atm 9. ______________________ 320 K 10. ______________________ 87 ml 11. ______________________ absolute zero 12. ______________________ 492 liters 13. ______________________ 2.4 ml

Combine gas law STP = standard temperature and pressure ST = standard temp = 273K SP = standard pressure = 1 atm or kPa

Step 1 if temperature is not in K, convert! K = C C = K VolumePressureTempVolumePressuretemp 80ml96kPa27C99.0kPa0C

Step 2: Plug the numbers into the equation PV T = VolumePressureTempVolumePressuretemp 80ml96kPa300K99.0kPa273K

Step 3: Solve 80 ml x 96 kPaV x 99 kPa 300 K273K = 80 x 96 x 273 = V x 99 x x 96 x 273 = V (99 x 300)