Plz help with this example , calculation of energy balance , show the process in

Question

Plz help with this example , calculation of energy balance , show the process in detailed. Thnx Plz help with this example , calculation of energy balance , show the process in detailed. Thnx Please help with this energy balance problem. Thank you! 2. Calculate the cooling duty required to condense and cool acetone from 100'C to 25 C at atmospheric pressure. The heat of vaporization for acetone at its normal boiling point is 30.2 kJ/mol. Acetone (vap) 100 mol/sec -100 C P 1 atm Acetone (liq) 100 mol/sec T-25 C Q (k/sec)

Explanation / Answer

Heat of vaporization of acetone = 30.2 kJ/mol = 30200 J/mol = Heat removed for condensation of acetone

moles of acetone used = 100 mol/sec

Specific heat of acetone liquid = 125 J/mol K

Normal boiling point = 56 degreeC

Specific heat of acetone vapor = 87.53 J/mol K

Total heat to be removed = Heat required to cool vapor from 100 degC to 56 degC + Heat of Condensation + Heat required to cool acetone liquid from 56 degC to 25 degC = n x Cpg x (100-56) + n x Heat of condensation + n x Cpl x (56-25) = 100 x (87.53 x 44 + 30200 + 125 x 31) = 100 x (3851.32 + 30200 + 3875) = 3792632 J/ sec = 3.792 x 10 = 3792. 6 kJ/sec

Cooling duty = 3792.6 kJ/sec

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