CHEN 304 1st Edition Lecture 4Outline of Last Lecture I. Units and Systems of UnitsII. Pressure in a Liquid with a Free SurfaceIII. Total Force on a Dam GateOutline of Current Lecture I. Mass, Energy, and Momentum BalanceII. Mass BalanceIII. Steady State Mass Balance for Fluid FlowIV. Energy BalanceV. PowerCurrent LectureChapter 2Mass, Energy, and Momentum Balance- General conservation laws – extensive quantityo Mass: total or species balanceo Total energy: internal, kinetic, potential, and pressureo Momentum: linear or angular- Non-reacting systemo Xin – Xout = Xsystemo Xin: amount of X taken out of the systemo Xout: amount of X taken out of the system- Reacting systemo Xiin – Xiout + Xicreated – Xidestroyed = Xisystemo i: species in chemical reactionso Xicreated: amount of X created within the systemo Xidestroyed: amount of X consumed within the systemMass Balance- Min – Mout = dM/dtThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Min: rate of addition of mass into the system- Mout: rate of removal of mass from the system- dM/dt: rate of accumulation of mass into the system- When dM/dt=0 then steady stateSteady State Mass Balance for Fluid Flow- Assume steady state so no accumulationEnergy Balance- Use generalized Bernoulli equation- F must always be positive- W is positive for work on environment (turbine)- W is negative for work on system (pump)Power- Rate of expanding energy- Expressions for power table