Chem 2115 Experiment Date_ Name Section GAS BEHAVIOR Trial 1 Trial 2 I. Data NaH

Question

Chem 2115 Experiment Date_ Name Section GAS BEHAVIOR Trial 1 Trial 2 I. Data NaHC03 Mass of test tube and contents 43 508 146:92o 9 before heating 59 146 92 9 afterheating 532 Mass loss :528 Volume of Co, colleted, v 9232L O.232L Volume of Co, collected. V Temperature of Co,, T 212K295 k Temperature of co,,T 45K Water vapor pressure at CO2 temperature IL. Calculations Mass of CO, collected Moles af COs, n System temperature ,T Pressure of CO, (atm) Experimental R pV/nT Molar Volume VmV/ Standard molar volume at STP VII-5

Explanation / Answer

CO2
trail 1
Mass of CO2 collected= 0.588g
moles CO2 =0.588/44=0.0133
Temperature = 295K
Pressure CO2=760.90 mmHg=1.001 atm
R= pV/nT= 1.001 *0.232 /0.0133*295 =0.059 L atm K1 mol1
Molar Volume= V/n=0.232/0.0133 =17.44 L
standard molar volume at STP= (0.232/0.0133 )*(273*1.001)/295*1
=16.15 L
Trail 2
Mass of CO2 collected= 0.583g
moles CO2 =0.583/44=0.0132
Temperature = 295K
Pressure CO2=760.90 mmHg=1.001 atm
R= pV/nT= 1.001 *0.211 /0.0132*295 =0.054 L atm K1 mol1
Molar Volume= V/n=0.211/0.0132 =15.98 L
standard molar volume at STP= (0.211/0.0132 )*(273*1.001)/295*1
=14.8 L

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