CHE 434 Third Exam

5,125 kg⋅h⁻¹ of an equimolar ethanol and acetic acid binary mixture are heated at 107.3 kPa. The initial temperature of the mixture is 27 ◦C. Calculate the heat requirement to produce saturated vapor. (NRTL)

• 1123 KW

• 20192 KJ/hr

• 1071 KW

• 2601 KW

A gas mixture flowing at a rate of 100 lb-mole/hr containing 55 mole% SO₂ and the balance is air contacted with liquid water (89700 lb-mole/h) in a continuous absorber. Assuming that the gas and liquid streams entering and leaving the absorber in equilibrium at 30°C and 1 atm, calculate the molar flow rate of the SO₂ in both outlet streams. (SRK)

• 29.7808 Kgmol/hr

• 24.9478 Kgmol/hr

• 26.9618 Kgmol/hr

• 29.4902 Kgmol/hr

Natural gas contains 81 mol% methane and 19 mol% carbon dioxide is pumped through a horizontal Schedule 40, 6-in.-diameter cast-iron pipeline at a mass flow rate of 610 kg/h. If the pressure at the pipe inlet is 3.45 bars and 23°C, the pipeline length is 1.9 km downstream. If the ambient temperature is 25 C and the pipeline without insulation, calculate the pressure drop across the pipe . (SRK)

• 3.701 KPa

• 3.619 KPa

• 3.861 KPa

• 4.134 KPa

Consider the following mixture: CO, 105kmol/h; Co₂, 210 kmol/h; O₂, 90 kmol/h. The gas at 15 atm and mass enthalpy -6083 kJ/kg. Find the gas temperature. (SRK)

• 307 C

• 382 C

• 214 C

• 203 C

A compressor is used to compress 100 kg/h of natural gas consisting of 80 mol% methane, 10% ethane, 5% carbon dioxide, and the remaining nitrogen from 3 bars and 30°C to 10 bars. Find the compressor duty (SRK)

• 9.702 KW

• 9.281 KW

• 5.031 KW

• 6.559 KW

Consider the following liquids phase reactor in an isothermal CSTR

Ethanol + Diethylamine  -------- >  Triethylamine + Water

The inlet at pressure 354.5 kPa, temperature 50 C and flow rate (kgmol/hr), 50 Ethanol, 50 Diethylamine and 95 Water. With A=4775 kgmol/m³-hr, activation energy E=10000 J/mol. If the reactor volume is 4440.8 L, what percent conversion of ethanol will be achieved? (PRSV)

• 91.08

• 91.81

• 91.71

• 91.17