BALANCES ON REACTIVE PROCESS (ENERGY BALANCE) - 1 BALANCES...

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Unformatted text preview: 1 BALANCES ON REACTIVE PROCESS Chapter 4 Chapter 4 Chapter 4 Chapter 4 Reaction releases heat – exothermic reaction Reaction requires heat – endothermic reaction HEAT OF REACTION ,- Enthalpy change for a process in which stoichiometric quantities of reactants at T & P react completely in single reaction to form products at the same temperature and pressure ) ( ) ( ) ( ) ( 2 ) ( 2 2 2 2 2 g H C s OH Ca l O H s CaC + → + If the reaction reacts completely, initial and final temperature/pressure (25˚C/ 1 atm) H products-H reactants = -125.4 kJ Δ Ĥ r = (100˚C, 1 atm) = -50kJ/mol Δ Ĥ r is applied to stoichiometric quantities for each species (kJ/mol) Example : 2A + B 3C ted molCgenera kJ ed molBconsum kJ ed molAconsum kJ 2 50 1 50 2 50 − = − = − Say that 150 mol of C/s was generated in the given reaction at 100˚C And 1 atm, the associated enthalpy change as s kJ s ted molCgenera ted molCgenera kJ H / 2500 150 3 50 − = × − = Δ & r A A o o r n P T H H , ) . ( ν Δ = Δ...
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BALANCES ON REACTIVE PROCESS (ENERGY BALANCE) - 1 BALANCES...

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