True or false (please show work) 1) If the concentrstion of CO2 at 350K and .75

Question

True or false (please show work)

1) If the concentrstion of CO2 at 350K and .75 atm is 400 mg/m^3, it does not exceed the global average of 400 ppm.

2) If the equiibrium constant of NO formation is 4.576exp(-10872/T) the equilibrium molar concentration of NO exceeds 1 % at 2200 K and 20 atm.

3) If the equilibrium constant for the conversion of SO2 to SO3 is 1.458exp(1.181e4/T), the SO2-to-SO3 ratio exceeds .50 at 1800 K and 5 atm if the starting SO2/O2 molar ratio is 1/5

4) If the rate constant for a first order reaction is 1.5e6exp(-20,000/T), it takes less than 1.5 seconds to achieve a 75% conversion rate at 1500 K

Explanation / Answer

1) If the concentration of CO2 at 350K and 0.75 atm is 400 mg/m^3, it does not exceed the global average of 400 ppm.

True

Explanation- To convert mg/m3 to ppm at 350K and 0.75 atm , calculate the volume of 1 gram molecular weight of CO2 by using the formula

V = (nRT/ P)

V = 1mol x 0.082 057 46 L atm K1mol-1 x 350 K/0.75 atm

V= 38.29

Following formulas is used to convert mg/m3 to ppm.

CO2 ppm   =   (CO2 mg/m3)(volume of CO2)/(molecular weight of CO2)

X ppm   =   (400)(38.29)/(44.01) = 348.012ppm

348.012ppm does not exceed the global average of 400 ppm, so the statement is TRUE

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