CHAPTER 4 (Non-Reactive process) - CHAPTER 4 ENERGY BALANCE...

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1 CHAPTER 4 ENERGY BALANCE Free Template from www.brainybetty.com 2 Free Template from www.brainybetty.com 3 General balance on closed system Input + generation – output –consumption = accumulation According to the 1st law, generation = 0, consumption = 0. Hence, the equation: Input – output = accumulation final - initial net energy transferred system system = to the system energy energy Accumulation = (final value of the balanced quantity) – (the initial value of this quantity) Initial system energy = pi ki i E E U + + Final system energy = pf kf f E E U + + Energy transferred = W Q + Free Template from www.brainybetty.com 4 W Q E E U p k + = Δ + Δ + Δ First law thermodynamics for a closed system is : Points should be considered: 1) No temperature changes No phase changes No chemical reaction occur 2) pressure changes <a few atmospheres 3) If system is not accelerating, Δ Ek=0 If system is not rising/falling, Δ Ep=0 4) If T system =T surroundings, Q=0 5) If no moving parts /electrical currents at system boundary W=0 Free Template from www.brainybetty.com 5 General balance on open system First law thermodynamics for a open system at steady state is : s p k W Q E E H = Δ + Δ + Δ fl s W W W + = Net rate of work Free Template from www.brainybetty.com 6
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2 Free Template from www.brainybetty.com 7 Free Template from www.brainybetty.com 8 Free Template from www.brainybetty.com 9 Free Template from www.brainybetty.com 10 Free Template from www.brainybetty.com 11 Free Template from www.brainybetty.com 12
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3 Free Template from www.brainybetty.com 13 Tables of thermodynamic data Reference states and states properties Example : The enthalpy changes for CO going from a
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This note was uploaded on 05/08/2011 for the course ACCOUNTING 121210 taught by Professor Sdasdas during the Spring '10 term at Albany College of Pharmacy and Health Sciences.

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CHAPTER 4 (Non-Reactive process) - CHAPTER 4 ENERGY BALANCE...

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