ME300Lecture30

# ME300Lecture30 - Lecture 30: Vant Hoff Equation Objective:...

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30.1 Lecture 30: Van’t Hoff Equation Objective: » Equilibrium constant K is a function of temperature (A-27) » Alternative way to express K is by the van’t Hoff equation o T o o o T T T oo o TT T 22 G ln K RT G H T S d H d T S d ln K H dT RT RTdT RT

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30.2 Continue Van’t Hoff Equation At constant p, Tds = dh – v dp = dh also T d( S) = d( H) oo o TT T 22 o T 2 d H d T S d lnK H dT RT RTdT RT H dT RT
30.3 Continue Van’t Hoff Equation Because H is only a function of T for ideal gas This is the van’t Hoff equation For small T, H, the enthalpy of reaction, does not change much. By integrating the van’t Hoff equation, we have T 2 d ln K H dT RT 2T 1 2 1 KH 11 ln K R T T

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30.4 Example 30.1 Given: The combustion process of hydrogen

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ME300Lecture30 - Lecture 30: Vant Hoff Equation Objective:...

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